Perhaps you should try some spelling variations:
ban thanh » ban hanh
ban hang » ngan hang
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
cao duc » dao duc, cao suc, giao duc
sach ty » sach y, sach tu, sach thu
cac dac » cac dan, cac dai, cac bac
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang

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 ty lang xa hoi. hieu va ((cac dac) or (cao duc)) ((ban thanh) or (ban hang)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty lang xa hoi. hieu va ((cac dac) OR (cao duc)) ((ban thanh) OR (ban hang)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty lang xa hoi. hieu va ((cac dac) or (cao duc)) ((ban thanh) or (ban hang)) vai cua tre*.