Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
tan thang » toan thang, tran thang, van thang
cong lang » cong vang, cong luong, cong quang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
he hieu » he nhieu, he dieu, de hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: he hieu lang - thanh cong tan thang ((cong san) or (cong lang)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: he hieu lang - thanh cong tan thang ((cong san) OR (cong lang)) than cap.
• Adding a wildcard symbol may retrieve word variants: he hieu lang - thanh cong tan thang ((cong san) or (cong lang)) than cap*.