Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
thai cao » tai cao, thoai cac, thuat cao
cong va » dong va, cong ha, cong tac
va dang » van dang, va nang, va lang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - thanh cong va dang ((cong tan) OR (cong san)) thai cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sang)) - thanh cong va dang ((cong tan) OR (cong san)) thai cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - thanh cong va dang ((cong tan) OR (cong san)) thai cao*.