Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
cao luc » bao luc, cao duc, cao suc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va
tu san » thu san, tu ban, tu can
te sac » te sach, te cac, te san

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) or (tu san)) ((ky tang) or (ky dang)) xa hoi. hieu va cao luc va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (tu san)) ((ky tang) OR (ky dang)) xa hoi. hieu va cao luc va hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (tu san)) ((ky tang) or (ky dang)) xa hoi. hieu va cao luc va hanh tai cua tre*.