Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh dai » thanh hai, thanh tai, thanh dat
hoc sach » hoc sinh, hoc cac, hoc anh
sach tu » sach thu, cach tu, sach ty
tu dang » thu dang, tu dong, su dang
dang ma » dang mau, dang mam, dang mat
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach tu dang ma hoi. hieu ((va cam) or (va cac)) cuc ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach tu dang ma hoi. hieu ((va cam) OR (va cac)) cuc ban thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach tu dang ma hoi. hieu ((va cam) or (va cac)) cuc ban thanh dai cua tre*.