Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap
ha dong » hoat dong, van dong

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) OR (chieu xanh)) - thanh trung ((huy dong) or (ha dong)) cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chieu xanh)) - thanh trung ((huy dong) OR (ha dong)) cong tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (chieu xanh)) - thanh trung ((huy dong) or (ha dong)) cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (chieu xanh)) - thanh trung ((huy dong) or (ha dong)) cong tan than cau*.