Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
huong cong » luong cong, duong cong, cuong cong
tranh va » tranh van, trang va, trinh va
va huong » va thuong, va phuong, va tuong
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
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 (trieu tinh)) - canh tranh va huong cong ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (trieu tinh)) - canh tranh va huong cong ban than cau*.