Perhaps you should try some spelling variations:
nhiet tach » chiet tach
trung tuan » trung thanh, trung tam, tran tuan
truong cua » truong ca, truong quan, truong cao
thong cong » trong cong, tong cong, thong thong
hoc nhiet » hoc thiet, hoc nghien, hoc hien
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan 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 - thanh ((trung tuan) or (truong cua)) thong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhiet tach - thanh ((trung tuan) OR (truong cua)) thong cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - thanh ((trung tuan) or (truong cua)) thong cong tan van ban*.