Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chiet tach » chieu sach
thanh tung » thanh cong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, phan cau, than cap
tung va » trung va, tuong va, dung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (chiet tach)) - thanh tung va nhung ((cong dan) or (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chiet tach)) - thanh tung va nhung ((cong dan) OR (cong san)) than cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chiet tach)) - thanh tung va nhung ((cong dan) or (cong san)) than cau*.