Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
ban thanh » ban hanh, ban hang
thai cua » than cua, tai cuc, tri cua
lang van » dang van, tang van, hoang van
te sach » toc sach
sach ty » sach y, sach tu, sach thu
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
va cao » va cac, va co, va dao
va cam » va cham, va cac, 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: te sach ty ((tang ma) or (lang van)) hoi. hieu ((va cam) or (va cao)) duc ban thanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((tang ma) OR (lang van)) hoi. hieu ((va cam) OR (va cao)) duc ban thanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((tang ma) or (lang van)) hoi. hieu ((va cam) or (va cao)) duc ban thanh thai cua tre*.