Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
van thang » van thanh, van khang, van hang
cong lang » cong vang, cong luong, cong quang
he chieu » ho chieu, he nhieu, theo chieu
cong van » cong vang, song van, cong tan
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac

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

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