Perhaps you should try some spelling variations:
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
te cac » ve cac, te cao, de cac
soc va » hoc va, loc va, doc va
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: ((te cac) OR (tu cac)) ((ky lang) OR (ky tang)) xa hoi. hieu va cham soc va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) OR (tu cac)) ((ky lang) or (ky tang)) xa hoi. hieu va cham soc va hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((te cac) OR (tu cac)) ((ky lang) or (ky tang)) xa hoi. hieu va cham soc va hanh vi cua tre*.