Perhaps you should try some spelling variations:
ban thanh » ban hang
sach thu » sach thue, sach thieu, sach tham
thu bang » thu ban, thu hang, chu bang
ban hanh » ban hang
su sach » so sach, vu sach
bang xa » lang xa, bang va, mang xa
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu bang xa hoi. hieu va pham duc ((ban thanh) or (ban hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu bang xa hoi. hieu va pham duc ((ban thanh) OR (ban hanh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach thu bang xa hoi. hieu va pham duc ((ban thanh) or (ban hanh)) vai cua tre*.