Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
te sai » te tai, te lai, te hai
te bai » te bao, te tai, te lai
te ban » te bao

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 sai) OR (((te bai) OR (te ban)))) ky nang x ho. hieu va cac tuc van hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sai) or (((te bai) OR (te ban)))) ky nang x ho. hieu va cac tuc van hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sai) or (((te bai) OR (te ban)))) ky nang x ho. hieu va cac tuc van hanh vai cua tre*.