Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
cao duc » dao duc, cao suc, giao duc
duc ban » duc tan, duc van, dua ban
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang ma) or (lang xa)) hoi. lieu va cao duc ban thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang ma) OR (lang xa)) hoi. lieu va cao duc ban thanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang ma) or (lang xa)) hoi. lieu va cao duc ban thanh tai cua tre*.