Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu sach » chieu sach, hieu cach, dien sach
trung cua » truong cua, trung tuan, trung cap
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
cua dang » cua cong, cua ban
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 - thanh trung cua dang cong san ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - thanh trung cua dang cong san ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - thanh trung cua dang cong san ((toan cau) or (toan ban))*.