Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
tuan thong » toan thong, tuan phong, xuan thong
tran thong » toan thong, tran hong, tran trong
hieu lang » hieu quang, nhieu tang, hieu van
cong tan » cong tac, cong san, cong thanh
tan gian » tran gian, dan gian, van gian
gian cau » gian chau, gian cac, gian cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (chieu sang)) - thanh trung ((tuan thong) OR (tran thong)) cong tan gian cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - thanh trung ((tuan thong) OR (tran thong)) cong tan gian cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chieu sang)) - thanh trung ((tuan thong) OR (tran thong)) cong tan gian cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sang)) - thanh trung ((tuan thong) OR (tran thong)) cong tan gian cau*.