Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
vien da » vien dai, hien dai
xuc van » duc van, luc van, vuc van
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, me hoi

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 sac ky nang ((ma hoi) OR (xa hoi)). hieu vien da xuc van hanh lai cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (xa hoi)). hieu vien da xuc van hanh lai cua tre*.