Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
cua tre » cua te, cuu tre, cua triet
hanh va » hang va, hanh vi
hieu va » lieu va, hieu qua
cac toc » cac toi, cac nuoc, cac thoi
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
toc ta » toc tay, toc thai
tu ban » thu ban, te ban
tu san » thu san, tu can, vu san

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