Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
bang cong » dang cong, bang song, hang cong
cong cua » cong cu, dong cua, huong cua
cua bang » chua bang, cua ban, cua dang
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

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