Perhaps you should try some spelling variations:
nhiet tach » chiet tach
thong cong » trong cong, tong cong, thong thong
hoc nhiet » hoc thiet, hoc nghien, hoc hien
trang cua » tranh cua, trung cua, thang cua
tang cua » mang cua, hang cua, tang luan
cong san » cong tac
san van » tan van, luan van, tran van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nhiet tach - hanh ((trang cua) or (tang cua)) thong cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhiet tach - hanh ((trang cua) OR (tang cua)) thong cong san van ban.
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - hanh ((trang cua) or (tang cua)) thong cong san van ban*.