Perhaps you should try some spelling variations:
thanh trung » thanh tung
tieu sach » chieu sach, dien sach, te sach
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - thanh trung cua nhung ((cong dan) or (cong tac)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - thanh trung cua nhung ((cong dan) OR (cong tac)) toan tap.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh trung cua nhung ((cong dan) or (cong tac)) toan tap*.