Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
bach tu » bach thu, cach tu, bac tu
hang vi » hang va, hanh vi, hang di
cua tre » cua te, cuu tre, cua triet
tu ban » thu ban, te ban
vi cua » vai cua, di cua

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 ky nang ((x ho) OR (xa hoi)). hieu vien bach tu ban hang vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x ho) or (xa hoi)). hieu vien bach tu ban hang vi cua tre*.