Home RESEARCH Ministry Research Projects

List of Ministry Approved Research Projects

03/06/2021 07:22 - Xem: 2267
Here is the list of Ministry approved research projects the University has been conducting from 2006 to 2020

List of Ministry Approved Research Projects in 2020

  1. Research on exploiting genetic resources and selecting strains of Trametes versicolor in the Northern mountainous region, 2020-2021. Duong Van Cuong
  2. Study on the role of some genes involved in the early stage of infection in tomato plants by Verticillium dahlia. 2020-2021. Bui Tri Thuc.
  3. Research and application of infrared spectroscopy to quickly determine the mechanical properties of Acacia mangium wood for the selection of large timber plantation varieties. 2020-2021. Duong Van Doan.
  4. Research on theoretical and practical basis for development and application of high technology in production, preservation and processing of some typical crops for Northern mountainous provinces. 2020-2021. Ha Minh Tuan.
  5. Research and apply high technology in the production of Dendrobium officinale Kimura et Migo to extract active ingredients capable of supporting the prevention and treatment of blood pressure, cardiovascular disease and cancer. 2020-2021. Nguyen Van Hong
  6. Research on creating organic substrates from local agricultural products to produce some typical vegetable and medicinal varieties in the Northern mountainous region. 2020-2021. Ha Duy Truong.
  7. The study discovered some key compounds capable of supporting the treatment of gout from some typical plant species in the Northern region to orientate the creation of functional products. 2020-2021. Le Quang Ung
  8. Research on production of nutrient solution from organic wastes for hydroponic cultivation for some vegetables and medicinal herbs in the Northern mountainous region. 2020-2021. Nguyen Thi Lan.
  9. Research on conservation and development of Phellinus ssp.producing anti-cancer substances isolated from Northern mountainous provinces. 2020-2021. Nguyen Manh Tuan.
  10. Application of molecular markers in classification, selection and identification of main active ingredients in some valuable medicinal species in the Northern mountainous region. 2020-2021. Nguyen Tien Dung.
  11. Managing the ministerial-level science and technology program under the program: Research, development and application of high technology in the production of some typical crops for the northern mountainous provinces. 2020-2021. Nguyen The Hung.
  12. Building a school model towards waste-zero for high schools. 2020-2021. Truong Thi Anh Tuyet.
  13. Research on migration and social integration of ethnic minority youth groups in industrial zones. 2020-2022. Dang Van Minh.

List of Ministry Approved Research Projects in 2019

  1. -  Study on the model of Passiflora foetida.L based on the value chain in Thai Nguyen province to increase income for people. Nguyen Thi Thu Hien.
  2. -  Study on the ability to apply chemical markers in traceability of honey in Dong Van rock plateau, Ha Giang province. Pham Thi Ngoc Mai.
  3. -  Studying policies and solutions to boost households and farms to improve commodity production capacity and link with traders and enterprises consuming key crop and livestock products in the Northern mountain areas. Dinh Ngoc Lan
  4. -  Research technical solutions in building a model of aquaculture to ensure water quality in the area of Coc lake, Thai Nguyen Province. Le Minh Chau.

List of Ministry Approved Research Projects in 2018

  1.   -  Research, select and develop technical measures for Korean melon in Thai Nguyen. Le Thi Kieu Oanh
  2.   -  Research on breeding and process of Cordyceps militaris species with high cordycepin content on solid artificial media. Tran Van Phung
  3.   -  Researching and experimenting on seedless sweet tangerine varieties (Citrus unshiu Marc) in Bac Kan and Thai Nguyen. Luan Thi Dep
  4.   -  Study the circulation of three parasitic diseases transmitted between animals and humans and prevention measures in Son La province. Nguyen Thi Kim Lan.
  5.   -  Building a new model of planting Dong Rieng (Canna edulis ) and integrating intensive cultivation in the Northern mountainous region. Nguyen Viet Hung
  6.   -  Study the causes and preventive measures of Morinda officinalis How root. Duong Thi Nguyen
  7.   -  Fabrication of zinc oxide nanoparticles by wet chemical method applied as environmentally friendly micro-fertilizer in agricultural production. Dang Thi Hong Phuong.

List of Ministry Approved Research Projects in 2017

  -  Research on propagation and planting techniques of Pygeum arboreum Endl providing large timber for some northern mountainous provinces of Vietnam. Nguyen Cong Hoan

  -  Research on some technical measures to improve productivity and quality of red intestine dragon fruit in Nguyen Binh district, Cao Bang province. Nguyen Minh Tuan.

  -  Study on the process of producing mycelia biomass and extracting polysaccharides and germanium in Ganoderma lucidum Thanh Hoa mushroom. Pham Bang Phuong.

  -  Study on mixing chitosan - nano silver complexes used in preserving oranges after harvest. Luong Hung Tien

  -  Researching and selecting varieties and some suitable cultivation techniques for maize on sloping land in Yen Bai Province. Tran Trung Kien

  -  Perfecting technology of male tilapia (Oreochromis niloticus) by soaking fries in water mixed with hormone 17a - Methyltestosterone in Thai Nguyen province. Tran Viet Vinh.

  -  Research on breeding and planting techniques of Machilus bonii Lecomte for planting large timber forests in some northeastern provinces of Vietnam. Nguyen Thi Thoa.

List of Ministry Approved Research Projects in 2016

  -  Application of biotechnology in conservation and development of endangered Paphiopedilum vietnamense orchid. Nguyen Thi Tinh

  -  Research on multiplication, planting Beanstalk (Sophora tonkinensis Gagnep) Beans (Fabanceae) in limestone mountains of Cao Bang Province. Tran Minh Hoa.

  -  Building a linkage model to synchronously apply technical and management advances in cassava production, processing, preservation and consumption in order to increase incomes, contributing to poverty reduction for mountainous ethnic minority people in upland communes of Van Yen district (Yen Bai), Quynh Nhai district (Son La), Nguyen Binh district (Cao Bang). Nguyen Viet Hung.

  -  Building and developing a model for conversion and funeral from inefficient rice land to growing corn and red beans in the northern midland and mountainous areas. Nguyen The Hung

  -  Researching and conserving genetic resources of Orthosiphone stamineus Benth in Thai Nguyen province for research and training. Vu Van Thong.

  -  Research on conservation of cassava genetic resources for training in Thai Nguyen. Tran Ngoc Ngoan

  -  Sustainable poverty reduction solutions based on multi-dimensional approach in Thai Nguyen Province. Bui Dinh Hoa

List of Ministry Approved Research Projects in 2015

  -  Research, select and develop a reasonable farming process to develop Pumpkin products in the Northern mountainous Provinces. Nguyen Viet Hung

  -  Study to build an ecological model of Melaleuca plantation on semi-submerged land in Son La hydropower basin. Tran Van Dien

  -  Preserve and store food-coloring gene sources of ethnic minorities in northern Vietnam. Luan Thi Dep

List of Ministry Approved Research Projects in 2014

  - Study on provitamin A production by recombinant Escherichia coli strain. Luong Thi Thu Huong

  - Research and develop a process for treating porous waste using essential oils extracted from citrus peels in the northern mountainous region of Vietnam. Tran Thi Pha

  - Study on prevention of aphids and root rot on high yielding sweet sorghum imported from Japan. Tran Thi nguyen

  - Research, select and develop some technical measures to cultivate commodity sweet potatoes in some northern mountainous provinces of Vietnam. Nguyen The Hung

List of Ministry Approved Research Projects in 2013

  - Conserving and preserving food coloring gene sources of ethnic minorities in Northern Vietnam. TS Luan Thi Dep

Approved in 2012

  • Studying characteristics of  natural regeneration in some types of vegetation and proposing  technical measures - Dr. Tran Quoc Hung
  • Determining the cause and proposing  solutions to overcome the cattle died in the winter-spring in some Northern mountainous provinces - Dr. Nguyen Hung Quang
  • Researching sustainability measures of Cassava cultivation yields high quality - Dr.Nguyen Viet Hung
  • Conservation and preservation gene resources of foodstuff colouring plants of ethnic minorities in northern  mountainous,  Vietnam - Assoc Prof.Dr. Luan Thi Dep
  • Completing the technological production and using bio-organic fertilizer NTT - Assoc Prof. Dr  Dang Kim Vui

Approved in 2011

  • Studying to selects plum with high-quality and high yielding for the Northern mountainous region - Dr. Vu Thanh Thuy

Approved in 2010

  • Studying and selecting drought resistant rice to adapt  two crop rice land in Thai Nguyen - Assoc Prof . Dr Nguyen Huu Hong
  • Studying and creating Escherichia coli strains  to produce lycopene to use  in food technology - Ma. Nguyen Xuan Vu
  • Studying the application for improvement of  System of Rice Intensification for the paddy field without irigation  in Thai Nguyen - Assoc Prof . Dr Hoang Van Phu
  • Research on the utilization of cassava leaf meal for broilers and egg laying chickens (layers) - Dr. Mai Anh Khoa
  • Study bio-method to rehabilitate agricultural soil after mining minerals in Thai Nguyen province - Assoc Prof. Dr Dang Van Minh
  • Studying indigenous knowledge in the use of  certain plants to prevent cabbage aphid in Northern mountainous areas - Assoc Prof. Dr Nguyen The Hung
  • Studying the permeability and potentiality of water retention  of forests to prevent and forecast flood  in Dinh Hoa district, Thai Nguyen province - Assoc Prof. Dr Do Thi Lan
  • Studying the adaptation and the technique measures to produce safety and off-season temperate vegetables  at Phia Den, Cao Bang province - Dr. Nguyen Thuy Ha
  • Studying the agro-biological characteristics of the Sa Dien grapefruit (Chineses) in some ecological regions of the North mountainous Vietnam - Ma. Luong Thi Kim Oanh
  • The  status and the solution management, re-use household wastes  in urban area in Thai Nguyen city - Assoc.  Prof. Dr Nguyen Ngoc  Nong
  • Studying the sustainable usage of agricultural land Dinh Hoa district – Thai Nguyen province - Ma. Truong Thanh Nam
  • Studying the possibility of accumulation of heavy metals  in the soil and the roots of plants mainly  in mining areas in Dong Hy district, Thai Nguyen province - Ma. Tran Thi Pha
  • Evaluating the current production, nutrient composition and  the heavy metal content in watercress in Thai Nguyen - Assoc.  Prof. Dr Nguyen Khac Thai Son
  • Studying to grow, produce and use  powdered grass Stylosanthes guianensis CIAT 184 for broiler breeding in Thai Nguyen - Ma. Ho Thi Bich Ngoc
  • Combining information from multispectral satellite images, duration by multivariate statistical methods to improve classification accuracy in vegetation cover - Ma. Ha van Thuan
  • Studying, preparing  and using some medical herbs to prevent and treat diseases for  livestock and poultry - Dr. nguyen Quang Tinh
  • Studying, developing  and testing thepreventive vaccine for swine coccidiosis in Thai Nguyen - Dr. Le Minh
  • To study on using some fermented cassava root and cassava top leaf with stylo in the diet of growing pigs at household - Dr. Nguyen Hung Quang
  • Evaluating  the results of technical applications for afforestation industrial plywood  in Dong Hy and Phu  Binh district, Thai Nguyen province - Ma. Tran Cong Quan
  • Application of quantitative methods in studying of forest regeneration in Dinh Hoa district, Thai Nguyen Province - Ma. Dang Thi Thu Ha
  • Studying the decentralization of watershed protection forest in Cho Moi district, Bac Can province - Ma. Nguyen Thi Thu Hoan
  • Studying the effect of fertilizer  on growth and fruit yield of  white canarium after transplanting  in Phu Luong and Dong Hy district, Thai Nguyen - Ma. Luong  Thi Anh
  • Studying the development solutions of non timber forest product to  sartisfy livelihood and increase income of people in buffer zone  of Tam Dao National Park - Ma. Do Hoang Son
  • Studying to grow high-tech hydroponic vegetable  in  greenhouse conditions to serve socio-economic development  for mountainous  provinces of  the Northern Vietnam - Dr. Le Sy Loi


Approved in 2009


  • To improve production process of pellet feed which have suitable protein level balanced essential amino acids in order to develop pig husbandry and reduce environment pollution - Assoc. Prof. Dr. Phung Van Tran
  • The study with aims to produce varieties of citrus, that has high quality to eliminate hunger,  reduce poverty and develop socioeconomic in Northern mountainous region of Vietnam - Assoc. Prof. Dr. Binh Xuan Ngo
  • Collecting, evaluating and selecting some  plants that can improve polluted soil  by heavy metals in Northeast mountainous region of Vietnam - Assoc. Prof. Dr.Dang The Nguyen
  • The study of the experiment in some pure rice  lines that have just been selected and created in some ecological areas - MSc.Ngoc Van Pham
  • Studying, experimenting and documenting some methods to reach to the development of livelihood base on the community with the  sustainable development of rural areas for the Northern mountainous minority of Vietnam - MSc.Minh Ha Thi Bui
  • To study biological characteristics and test biological control measures of  leaf worm on  Casia siamea Lamk in plantation forests  of Cho Moi state forestry enterprise - Bac Kan province - MSc.Tuyen Kim Dang
  • Studying the development of ecological urban agriculture  in Thai Nguyen City - MSc.Tho Van Le
  • Studying the effects of disinfection, storage and stimulating methods on incubation rate of chicken eggs - MSc.Thanh Binh Thi Nguyen
  • A research on infection, pathological clinical characteristics and preventive and treatment methods to Trichostrongylidosis disease of cattle in Thai Nguyen provinces - MSc.Hong Phuc Phan
  • The real situation and  solutions to  improve income  of farmers after  land revocation to  serve industrial zones in Thai Nguyen province - Dr. Hoa Dinh Bui
  • Studying and selecting some rice lines with  high quality  and cold resistance  for mountainous regions of Northern Vietnam - Dr. Dang Quy Nhan
  • Research commune-level rural development models in the context of rural industrialization and modernization in Dinh Hoa district, Thai Nguyen Province - Dr.Dinh Ngoc Lan
  • Studying model of Community Forest Management in buffer zone of conservation areas of  Bac Kan province - Dr.Le Sy Trung
  • Collecting, evaluating and conserving gene sourse of  up-land rice in the Northern provinces of Vietnam - Dr.nguyen Duc Hanh
  • Building the poultry safe zone of a commune in the  West of Thai Nguyen and proposing solutions for urban areas - Dr.Nguyen Thi Thuy My
  • Technology application of GIS and Wischmeier W.H-Smith D.D equation to predict soil erosion on the hillside of Son Dong district-Bac Giang province - Dr. Nguyen Tuan Anh
  • Research on some technical methods of intensive farming and increasing yield for spiny-bitter cucumber plants in Thai Nguyen - Dr. Nguyen Viet Hung
  • Research on the growth characteristics of some bamboo species in Thai Nguyen as a base for selecting proper species for material bamboo plantation - Dr. Vu Thi Que Anh
  • Research on the guideline of intensive farming technique that gives high economic efficiency for some cold and drought tolerrant rice varieties in Thai Nguyen University of Agriculture and Forestry - Ma. Nguyen Thi Lan
  • Evaluating the growth and adaptation of Acasia Magium and  hybrid  Acasia from different sources in Son Duong experimental camp , Tuyen Quang province - Dr. Tran Thi Thu Ha
  • Studying of falling productivity and ability to return  nutrients to the soil  of the natural recovery of secondary forests in Me Linh  Biodiversity Station, , Vinh Phuc - Ma. Do Hoang Chung
  • Study on agro-biological characteristics of some short time hybrid maize cultivars in spring crop and winter crop 2009 – 2010 in Thai Nguyen - Ma. Duong THi Nguyen
  • Separating line and  DNA sequencing of lycopene beta-cyclase gene - Ma. Duong Van Cuong
  • Studying the chemical composition some plants  belonging to Alocasia family - Ma. Lanh Thi Ngoc
  • Studying biomass and CO2 accumulation ability  of forest timber IIB after exploiting in Thai Nguyen - Ma. Nguyen Thanh Tien
  • Studying on woody plant diversity in forest conditions through the structure species in natural conservation Than Sa-Phuong Hoang-Thai Nguyen - Ma. Nguyen Thi Thoa
  • Evaluating and selecting some local plants  which can kill weeds in Northeast areas - Ma. Bui Lan Anh
  • Some basic problems of Vietnamese theoretical literature  in renovation period (from 1986 to present) - Ma. Cao Thi Hong
  • Study on formulation of the protocols to measurea urea in fish sauce in Vietnam - Ma. Vu Thi Hanh
  • Some problems concerning Artin module and finite set of mounted elements – Dr. Nguyen Thi Dung
  • Studying the growth and development ability and drought tolerant capacity of several new corn varieties at Thai Nguyen University of Agriculture and Forestry - Dr. Phan Thi Van
  • Studying the absorption of carbon in forest conditions as a  basis for the payment of environment service in the area of  Coc lake - Thai Nguyen province - Dr. Tran Quoc Hung
  • Studying trials of micro-organic fertilizer  produced in Thai Nguyen province - Dr. Do Thi Ngoc Anh
  • Studying on epidemiology, pathology, clinical treatment and  therapeutic measures tapeworm in chicken - Ma. Nguyen Thi Ngan
  • Studying the effects of phytase enzyme  on the broiler production and determining the appropriate additional rate - Ma. Nguyen Thu Quyen
  • Research on the effect of different ways on growing cassava for leaves, N levels and processing method of cassava leaf to productivity and chemical composition of cassava leaf at Thainguyen University of Agricultural and forestry - Ma. Tran Thi Hoan
  • Studying the techniques to produce high value flower pots in northern provinces - Ma. Nguyen Minh Tuan
  • Studying the chemical composition of forage crops  planted in the midland region and northern mountainous Vietnam - Assoc Prof. Dr  Tran Van Phung
  • Studying the sustainability of safe production models  by VietGAP standards in Thai Nguyen province - Ma. Nguyen Huu Tho
  • Studying the chemical composition of food legumes  and waste products of agricultural processing in the midland region, northern mountainous  of Vietnam - Dr. Hoang Toan Thang
  • Analysis of chemical composition of grains, roots and fruits in the midland region, nothern mountainous  of Vietnam - Ma. Nguyen Thi Hai
  • Studying  the effect of laboratory wastes  on the environment and  quality, safety of  food produced from animals and plants  which were fed and grown in the surrounding area - Assoc Prof. Dr. Luong Thi Hong Van

Approved in 2008

  • Studying, conserving and  sustainable using some local vegetables that have commercial values - Assoc. Prof. Dr. Vui Kim Dang
  • Studying the use of some local varieties of grass (p.astratum, b.brizantha 6378 and b.decumben) to  feed cattle - MSc.Kien Trung    Tu
  • Studying, designing and  manufacturing a model of a maize sowing -machine combined with a small tractor - MSc.Bac Ngoc Cu
  • Studying features of epidemic and clinical pathology, and solutions to treat   swine coccidiosis in Thai Nguyen province - Assoc. Prof. Dr. Kim Lan Thi Nguyen
  • The study of the validity and the ability of replacing mineral fertilizer of some micro-organic fertilizers affecting  on productivity, quality and poverty of soil  used to grow cabbages in Thai Nguyen province - Dr. Hai Hoang
  • To research intensive forest models with Acacia and Eucalyptus for satifying the neeđ of material for wood processing in Dong Hi District, Thai Nguyen - MSc.Vinh Van Dam
  • Studying a technique of nitrate manure for tea bases on the  nitrate status of  tea leaves in Thai Nguyen province - Dr. Hung The Nguyen
  • Studying the effective microorganisms  used for household waste treatment to make fertilizer and protect the environment - Assoc. Prof. Dr.Nong Ngoc Nguyen
  • Studying some  ecological characteristics and  cultivation techniques  of Bo Khai trees in Thai Nguyen province - MSc.Hieu Chi Nguyen
  • Studying the conserving application of rare gene resource of orchid in Ba Be national park - Assoc. Prof. Dr. Binh Xuan Ngo
  • Studying the applications of producing a variety of  Lily bulbs in Northern mountainous region of Vietnam - MSc.To Nga Thi Dang
  • Studying acupuncture to treat some reproductive diseases and to  increase the  conception rate  by artificial insemination of  dairy cow in Phu Lam farm in Tuyen Quang province - MSc.Nguyet Hung Nguyen


Approved in 2007


  • To study some technical methods  in order to improve the quality of the productivity of  pure grass variety P.Atratum, B.Brizantha 6378  and B. Decumben in Thai Nguyen - Assoc. Prof. Dr. Tham Dinh Phan
  • Researching on the influence of Silica fertilizer to the growth, development, productivity and quality of rice and peanut in  infertile soil in Thai Nguyen and Vinh Yen province - Dr. Minh Van Dang
  • The effect of urbanization rate on the use of land in Thai Nguyen City - Dr. Lan Thi Do
  • The study of technical process to make variety of grafted Pili (canarium) in Thai Nguyen university of Agriculture and Forestry - Mrs. Anh Thi Luong
  • Studying the variety determination and suitable structure crops  in  one seasoned and non irrigated paddy field   in order to make a benefit  of 35-40 million dongs/ha/a year in Bac Kan province - MSc.Thi Dinh Nguyen
  • Researching on the application of graft technology in order  to  produce unseasonable tomato  in Thai Nguyen province - Dr. Ha Thuy Nguyen
  • Research on land site classification for afforestation business plywood in  plywood  forestry company Thai Nguyen - MSc.Quan Cong Tran
  • Researching  on the valuable chain of  of tea industry in order to give some solutions to  involve the particapation of the poor and enhance the competition of Thai Nguyen tea in the market - MSc.Tho Huu Nguyen
  • Evaluating the influences of wastewater  on the water and farmland in Cong River  in industrial zone 1 –Thai Nguyen province - Dr. Van Xuan Dam
  • The study of real situation and proposing solutions  for development  bamboo and rattan handicraft  village in Thai Nguyen province - MSc.Son Hoang Do
  • Studying and producing vaccine on the spot to prevent white dung disease  of piglets in some farms  in Thai Nguyen and Ha Tay provinces - Dr. Binh Xuan Dang
  • Studying and selecting variety and applying technical methods in multiplication and intensive cultivation to increase the productivity and quality of Netherlands Gerbera in Thai Nguyen - Assoc. Prof. Dr. Van Thanh Dao


Approved in 2006


  • The application of  biotechnology on rice breeding which have high productively, good quality and  high resistance to contribute to the reduction of hunger and poverty  in the Northern Mountainous Region of Vietnam - Assoc. Prof. Dr. Ngoan Ngoc Tran
  • Defining  appropriate protein rates based on the balance of necessary acid amines in food for imported pigs in  growth stage - Assoc. Prof. Dr. Phung Van Tran
  • Evaluating the need of technical staffs in Agriculture and silviculture for some provinces in the Northeast Mountainous Region of Vietnam in order to orient the training and meet the requirements  of staffs for industrialization and modernization of  provinces in the area in the period 2006-2010 – Assoc. Prof. Dr. Hoan Huy Nguyen
  • Study  on infection,  chemical chracteristics of microorganism  of Salmonella gallinarum- pullorum of chicken in some places in Thai Nguyen and Bac Ninh and some solutions for treatment and prevention - Dr. Cu Trung Do
  • The study of  necrotizing enterocolitis caused by Clostridium bacteria of piglets that are infected by their mother in Thai Nguyen province and solutions for treatment and prevention - MSc. Suu Van Nguyen
  • Study on the ability of the growth and providing meat of Saso chicken which have  colour feather and are  fed in Thai Nguyen province - Dr. Van Thanh Tran
  • Studying the budding characteristics and some technical methods  for seedless persimmon in Bac Kan - MSc. Huan The Nguyen
  • Study on the technical  methods of watering and humidifying for soybeans in winter crop in Thai Nguyen – MSc. Xuyen Thi Luu.
  • Evaluating potentiality and studying some technical methods for producing organic tea in Thai Nguyen province - Assoc. Prof. Dr. Dang The Nguyen
  • The study of some cultivated   techniques for  domestic tea varieties in period of basic construction in Thai Nguyen - MSc. Quy Thi Vu
  • The study of some  agrobiological characteristics  and the influences of micro-elements to productivity, quality and ripe age of Hung Long litchi variety in Thai Nguyen province - MSc. Thanh Thuy Thi Vu
  • · Evaluating the dependent of local people  on forest resource and proposing some solutions  to contribute the management of forest resources sustainably  in the buffer zone of Than Sa-Phuong Hoang nature reserve in Vo Nhai District-Thai Nguyen province - MSc. Man Van Nguyen
  • The study of some technical methods to prevent Acacia mangium Willd in newly  planted forests  in protective forest of Coc Lake in Thai Nguyen province - MSc. Kim Tuyen Dang
  • Study on the construction of technical process to produce Lily flowers in Thai Nguyen - MSc. Hoan Bao Bui
  • The research of the asexual multipliable ability and grown characteristics in seedling stage of selective shan teas  in  mountainous regions of Bac Kan - MSc. Chung Van Hoang