Perhaps you should try some spelling variations:
ban hanh » ban hang
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
tai hoi » tai khoi, dai hoi, tai hai
va tham » van tham, va cham, va thanh
cua tre » cua te, cuu tre, cua triet
va ham » va cham, va kham, ba ham
so ban » sao ban, so bang, co ban
vi cua » vai cua, di cua

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 cac ((ky tang) OR (ky dang)) tai hoi. hieu ((va ham) OR (va tham)) so ban hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ((ky tang) OR (ky dang)) tai hoi. hieu ((va ham) or (va tham)) so ban hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu cac ((ky tang) OR (ky dang)) tai hoi. hieu ((va ham) or (va tham)) so ban hanh vi cua tre*.