Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
gay trong » day trong, gap trong, gian trong
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 sang - thanh trung ((gay trong) or (cay trong)) cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung ((gay trong) OR (cay trong)) cong tac than cap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung ((gay trong) or (cay trong)) cong tac than cap*.