Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
thanh le » thinh le, thanh de, thanh liem
thanh ve » hanh ve, thanh va, thanh vien
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y nang xa hoi. hieu van cam duc van ((thanh le) or (thanh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang xa hoi. hieu van cam duc van ((thanh le) OR (thanh ve)) cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang xa hoi. hieu van cam duc van ((thanh le) or (thanh ve)) cua tre*.