Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
tranh cap » tranh chap, tranh cac, tranh cai
cong cong » cong dong, trong cong, dung cong
cap cong » cac cong, cao cong, tap cong
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: hoc ((chieu sach) or (chiet tach)) - canh tranh cap cong cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - canh tranh cap cong cong dan chan cau*.