Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hieu vien » hieu viec, thieu nien, hieu tieng
ban hang » ngan hang
hang vai » hang va, hang tai, hang hai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
bach tu » bach thu, cach tu, bac tu
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu ban » thu ban, te ban

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) OR (hieu hien)) bach tu ban hang vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((x ho) or (xa hoi)). ((hieu vien) OR (hieu hien)) bach tu ban hang vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x ho) or (xa hoi)). ((hieu vien) OR (hieu hien)) bach tu ban hang vai cua tre*.