Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
xuc van » duc van, luc van, xuc ban
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
ve cac » va cac, vien cac
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu bac
tu san » thu san, tu ban, tu can
ve cam » ve cham, va cam, ve cai

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