... 25 SOME RESEARCH PAPERS RELATED TO THE DISSERTATION 1. Le Dong Tan, Nguyen Anh Hung, Duong Thi Van Anh (2010), “Some research findings on the current status the vegetation in Phu Dinh ... Viet Nam Ministry of Education and training Thai Nguyen University NGUYEN ANH HUNG Studying on human affects on the sustainability of forest systems in ... of Kinh, Tay and Nung and the remaining ethnic groups account for low proportion (San Chi, Dao, Cao Lan, H 'mong and Thai groups). Dinh Hoa district's population is 87,722 people with...