Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
anh bang » anh hoang, anh quang, tinh bang
bang cua » ban cua, mang cua, hang cua
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tran tap » toan tap, tran tan, tran tuan

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 - anh bang cua dong ((cong tan) or (cong san)) tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - anh bang cua dong ((cong tan) OR (cong san)) tran tap.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - anh bang cua dong ((cong tan) or (cong san)) tran tap*.