Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
anh tri » anh thi, anh tai, thanh tri
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va
tu ban » thu ban, te ban
nang o » nang co, nang ho, nang ro
tu can » tu cac, thu canh
o lai » o lao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu ban) or (tu can)) ky nang o lai. ((hieu ve) OR (hieu van)) cac xuc van anh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu ban) OR (tu can)) ky nang o lai. ((hieu ve) OR (hieu van)) cac xuc van anh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu ban) or (tu can)) ky nang o lai. ((hieu ve) OR (hieu van)) cac xuc van anh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu ban) or (tu can)) ky nang o lai. ((hieu ve) OR (hieu van)) cac xuc van anh tri cua tre*.