Perhaps you should try some spelling variations:
thanh hang » thanh hoang, thanh thang, thanh hung
tranh hang » trinh han, tran hoang, tran hong
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
cong tac » cong ty
toan tap » toan ban
toan cao » toan ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((thanh hang) or (tranh hang)) cua thong cong tac ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((thanh hang) OR (tranh hang)) cua thong cong tac ((toan tap) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((thanh hang) or (tranh hang)) cua thong cong tac ((toan tap) or (toan cao))*.