Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
cuong tap » luong tap, luong tai, cong tan
tung cua » trung cua, tuong cua, dung cua
cong tac » cong ty
toan ban » van 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 tung cua cong ((cong tac) or (cuong tap)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh tung cua cong ((cong tac) OR (cuong tap)) toan ban*.