Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
lam cua » nam cua, lam chat
cua tre » cua te, cuu tre, cua triet
cac xuc » cam xuc, cac nuoc, chat xuc
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, me hoi
tu sac » tu sach, tu cac, tu san

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 cac xuc ((van hanh) OR (ban hanh)) lam cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((ma hoi) or (xa hoi)). hieu vien cac xuc ((van hanh) OR (ban hanh)) lam cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (xa hoi)). hieu vien cac xuc ((van hanh) OR (ban hanh)) lam cua tre*.