Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, hieu lang
nang quan » ban quan
hung cong » nhung cong, hung cuong, phung cong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
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: doi ((chieu tinh) or (chieu sang)) - ganh ((nang quan) OR (nang suat)) hung cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tinh) OR (chieu sang)) - ganh ((nang quan) OR (nang suat)) hung cong tac than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu tinh) or (chieu sang)) - ganh ((nang quan) OR (nang suat)) hung cong tac than cap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu tinh) or (chieu sang)) - ganh ((nang quan) OR (nang suat)) hung cong tac than cap*.