Tam, Nguyen Thanh http://orcid.org/0000-0001-5946-8423
Berg, Håkan
Tuyen, Phan Thi Bich
Van Cong, Nguyen
Funding for this research was provided by:
Swedish International Development Cooperation Agency (Sida) (AKT2010-010)
Ministry of Education and Training of Vietnam (4069/QĐ-BGDĐT)