Perhaps you should try some spelling variations:
dong thanh » truong thanh
tieu sach » chieu sach, dien sach, te sach
hanh hang » thanh hang, hang hang, hanh han
cua nhung » va nhung
hang cua » mang cua, hang ca, huong cua
cong tan » cong san, cong thanh, cong ty
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 - hanh hang cua nhung ((((cong tan) or (cong tac))) or (dong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh hang cua nhung ((((cong tan) OR (cong tac))) OR (dong thanh)) toan tap.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh hang cua nhung ((((cong tan) or (cong tac))) or (dong thanh)) toan tap*.