Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua duc » cua tuc, cua nuoc, cua quoc
cuu tre » cua tre, cau tren, cau treo
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
ve cac » va cac, vien cac
tu cai » tu cac, tu can, tu bai
tu sai » tu bai, tu san, tu lai

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 sai) OR (tu cai)) ky tang xa hoi. hieu ve cac xuc van hanh vi ((cuu tre) OR (cua duc))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu cai)) ky tang xa hoi. hieu ve cac xuc van hanh vi ((cuu tre) or (cua duc))~".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu cai)) ky tang xa hoi. hieu ve cac xuc van hanh vi ((cuu tre) or (cua duc))*.