Perhaps you should try some spelling variations:
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, hieu ca
trung cua » truong cua, trung tuan, trung cap
hoc hieu » hoc thieu, hoc hien, doc hieu
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 hieu cach - hanh ((trung cua) or (truong cao)) nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - hanh ((trung cua) OR (truong cao)) nhung cong san van ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - hanh ((trung cua) or (truong cao)) nhung cong san van ban*.