Perhaps you should try some spelling variations:
ban hanh » ban hang
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham so » cham soc, cham o, ham so
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi
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.

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