Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
kho tang » cao tang
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
tai cua » thai cua, tai cuc, tri cua
hieu va » lieu va, hieu qua
cac tu » cac thu, cach tu, cac du
su sai » su tai, su hai, su dai
hac tu » hoc tu, tac tu, bac tu

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: su sai ((ky lang) OR (kho tang)) xa hoi. hieu va ((hac tu) OR (cac tu)) ban hanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ((ky lang) or (kho tang)) xa hoi. hieu va ((hac tu) OR (cac tu)) ban hanh tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sai ((ky lang) or (kho tang)) xa hoi. hieu va ((hac tu) OR (cac tu)) ban hanh tai cua tre*.