Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
cao hoi » co hoi, cao hoc, tao hoi
hieu va » lieu va, hieu qua
cac toi » cac thoi
ta hanh » ta thanh, va hanh, tu hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
vu san » va san, vu ban
tu ban » thu ban, te ban
toi ta » toi tap, toi la, toi da

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: ((vu san) OR (tu ban)) ky nang ((cao hoi) OR (cau hoi)). hieu va cac toi ta hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu san) or (tu ban)) ky nang ((cao hoi) OR (cau hoi)). hieu va cac toi ta hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((vu san) or (tu ban)) ky nang ((cao hoi) OR (cau hoi)). hieu va cac toi ta hanh vai cua tre*.