Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
phan cua » nhan cua, than cua, phat cua
va thanh » gia thanh, va tinh, le thanh
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
sach v » sach va, sach y, sach 2
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v nang ma hoi. hieu ((va cam) or (va cao)) xuc ((va thanh) OR (ban thanh)) phan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang ma hoi. hieu ((va cam) OR (va cao)) xuc ((va thanh) OR (ban thanh)) phan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v nang ma hoi. hieu ((va cam) or (va cao)) xuc ((va thanh) OR (ban thanh)) phan cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach v nang ma hoi. hieu ((va cam) or (va cao)) xuc ((va thanh) OR (ban thanh)) phan cua tre*.