Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
so sach » so sanh, co sach
bo sach » co sach
van lam » van nam
lam tuc » lam thuoc, lam truoc, luat tuc
va hang » van hang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, x ho

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) or (bo sach))) or (hoc sach)) ky nang x hoi. hieu van lam tuc va hang va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((so sach) OR (bo sach))) OR (hoc sach)) ky nang x hoi. hieu van lam tuc va hang va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((so sach) or (bo sach))) or (hoc sach)) ky nang x hoi. hieu van lam tuc va hang va cua tre*.