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