Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sang mai » sang ma, sang tai, lang mai
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
loc va » hoc va
luc va » duc va, tuc va
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) or (tu ban)) ky sang mai hoi. hieu va cac ((loc va) or (luc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu ban)) ky sang mai hoi. hieu va cac ((loc va) OR (luc va)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu san) or (tu ban)) ky sang mai hoi. hieu va cac ((loc va) or (luc va)) hanh vai cua tre*.