Perhaps you should try some spelling variations:
van cham » van tham, va cham, van pham
van chat » cao chat
ban hanh » ban hang
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
so ban » sao ban, so bang, co ban

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