Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
tang ma » mang may, tang van
va dao » ca dao
va cam » va cham, va cac, va cao

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

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