Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue bang » thu bang, thien bang, thuat bang
ban thanh » ban hanh, ban hang
thanh lai » thanh hai, thanh lap, thanh loi
toc sach » hoc sach, doc sach, thuoc sach
bang xa » lang xa, bang va, mang xa
hieu va » lieu va
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
lai cua » dai cua, hai cua, lai chau
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: toc sach thue bang xa hoi. ((hieu va) or (hieu qua)) cac duc ban thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thue bang xa hoi. ((hieu va) OR (hieu qua)) cac duc ban thanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach thue bang xa hoi. ((hieu va) or (hieu qua)) cac duc ban thanh lai cua tre*.