Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
hieu sach » chieu sach, hieu cach, dien sach
cong than » cong thanh, cong thang, cong thai
dai dung » dai duong, dan dung, mai dung
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sach) or (chieu sang)) - thanh truong dai dung ((cong than) or (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (chieu sang)) - thanh truong dai dung ((cong than) OR (cong tan)) phan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) or (chieu sang)) - thanh truong dai dung ((cong than) or (cong tan)) phan cau*.