Perhaps you should try some spelling variations:
hieu sach » chieu sach, hieu cach, dien sach
doc hieu » toc thieu, hoc thieu, hoc hien
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
cua dang » cua cong, cua ban
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
thai cac » thoai cac, tai cac, khai cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sach - anh dung cua dang ((cong dan) or (cong san)) thai cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - anh dung cua dang ((cong dan) OR (cong san)) thai cac.
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - anh dung cua dang ((cong dan) or (cong san)) thai cac*.