Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
van hoc » van hoa
van hau » van ha, van hai, van dau
dai cuu » dai cua, dai huu
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty xang xa hoi. hieu ((van hoc) or (van hau)) xuc ((van hanh) or (ban thanh)) dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty xang xa hoi. hieu ((van hoc) OR (van hau)) xuc ((van hanh) OR (ban thanh)) dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty xang xa hoi. hieu ((van hoc) or (van hau)) xuc ((van hanh) or (ban thanh)) dai cuu tre*.