Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cuc ban » cua ban, cac ban, cuu ban
xuc ban » duc ban, quoc ban, xuat ban
van cam » van nam, van lam, van cau
ty nang » ky nang, ty hang, ly nang
cua tre » cua te, cuu tre, cua triet
anh te » anh tu, anh ta, anh ve
te cua » tue cua, le cua, de cua
x hoi » xa hoi, o hoi, x ho

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: tu sach ((ty nang) OR (ty xang)) x hoi. hieu van cam ((xuc ban) OR (cuc ban)) anh te cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty xang)) x hoi. hieu van cam ((xuc ban) or (cuc ban)) anh te cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty xang)) x hoi. hieu van cam ((xuc ban) or (cuc ban)) anh te cua tre*.