Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cam luc » cau luc
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
san ky » sang ky, van ky, dan ky
tu san » thu san, tu ban, tu can

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 ky nang xa hoi. ((hieu ve) OR (hieu van)) ((cam luc) or (cam xuc)) va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang xa hoi. ((hieu ve) OR (hieu van)) ((cam luc) OR (cam xuc)) va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang xa hoi. ((hieu ve) OR (hieu van)) ((cam luc) or (cam xuc)) va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang xa hoi. ((hieu ve) OR (hieu van)) ((cam luc) or (cam xuc)) va hanh vai cua tre*.