Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
ky tang » ky dang, kho tang, ky trong
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ((ky tang) or (ky nang)) xa hoi. hieu va cam luc va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky tang) OR (ky nang)) xa hoi. hieu va cam luc va hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ((ky tang) or (ky nang)) xa hoi. hieu va cam luc va hanh tai cua tre*.