Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
trinh chat » tinh chat, trinh luat, trinh han
doi chieu » doc hieu, doi chi, ho chieu
tam trong » lam trong, pham trong, tam thuong
nam trong » nam trung, cay trong
cong tan » cong tac, cong san, cong thanh
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 tung ((tam trong) OR (nam trong)) cong tan ((trinh chat) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh tung ((tam trong) OR (nam trong)) cong tan ((trinh chat) OR (than cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - thanh tung ((tam trong) OR (nam trong)) cong tan ((trinh chat) or (than cap))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh tung ((tam trong) OR (nam trong)) cong tan ((trinh chat) or (than cap))*.