Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
dung cong » dung trong
cong que » cong quy, thong que, huong que
que dung » qua dung, quyet dung, que huong
cong tam » cong tac, cong tan, cong nam
tam than » ban than
than cau » toan cau, phan cau, than cap

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

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