Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
cuu ban » cuu van, cua ban, cuu san
va chat » van chat, va phat, cao chat
va cham » va tham
hang xa » hoang xa, hang ca, lang xa
cua tre » cua te, cuu tre, cua triet

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