Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
quoc ban » quoc bao, quoc lan, quoc quan
kho tang » cao tang
xuc ban » duc ban, cuc ban, xuat ban
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, ky trong
vi cua » vai cua, di cua
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 tang) OR (kho tang)) xa hoi. hieu van cham ((xuc ban) OR (quoc ban)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky tang) OR (kho tang)) xa hoi. hieu van cham ((xuc ban) or (quoc ban)) hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky tang) OR (kho tang)) xa hoi. hieu van cham ((xuc ban) or (quoc ban)) hanh vi cua tre*.