Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
cong ban » cong bang, cong san, cong dan
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, than cap

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: ho chieu sang - thanh trung ((cua dung) OR (cua dang)) ((cong ban) OR (cong tan)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - thanh trung ((cua dung) or (cua dang)) ((cong ban) OR (cong tan)) than cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung ((cua dung) or (cua dang)) ((cong ban) OR (cong tan)) than cau*.