Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
lang van » dang van, tang van, hoang van
van hoi » van hoa, van hoc, van hoe
qua cac » cua cac
cac tuc » cac toc, cac tu, cac tac
hanh de » hanh ve, hanh kem
cuu tre » cua tre, cau tren, cau treo
sach v » sach va, sach y, sach 2
v lang » va lang, o lang, _ lang
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: toc sach v lang van hoi. hieu qua cac tuc va ((hanh de) OR (hanh vi)) cuu tre~.
• Adding a wildcard symbol may retrieve word variants: toc sach v lang van hoi. hieu qua cac tuc va ((hanh de) or (hanh vi)) cuu tre*.