Perhaps you should try some spelling variations:
thanh vung » thanh vuong, thanh tung, thanh hung
hieu xanh » chieu xanh, hieu manh, hieu nganh
tang bang » dang bang, tang ban, tang quang
doc hieu » toc thieu, hoc thieu, hoc hien
cong tac » cong ty
toan cao » toan tap
toan ban » van ban
tam ban » tai ban, tao ban, tay ban

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 xanh - thanh vung ((tang bang) or (tam ban)) cong tac ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh vung ((tang bang) OR (tam ban)) cong tac ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh vung ((tang bang) or (tam ban)) cong tac ((toan cao) or (toan ban))*.