Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, co sach
thanh vai » thanh hai, thanh van, thanh tai
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
cam tuc » cam xuc, cam tu, nam thuc
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (cuon sach)) va ((nang xa) OR (nang ma)) hoi. lieu va cam tuc va thanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (cuon sach)) va ((nang xa) OR (nang ma)) hoi. lieu va cam tuc va thanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (cuon sach)) va ((nang xa) OR (nang ma)) hoi. lieu va cam tuc va thanh vai cua tre*.