Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh chap » tranh cua, trinh chat
chap cong » phap cong, nhap cong, chat cong
cong cong » cong dong, trong cong, dung cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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 (chinh sach)) - hanh tranh chap cong cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chinh sach)) - hanh tranh chap cong cong dan than cap*.