Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu 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 sac ky nang xa hoi. ((hieu ve) OR (hieu van)) cac xuc ((van hanh) or (ban hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. ((hieu ve) OR (hieu van)) cac xuc ((van hanh) OR (ban hanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. ((hieu ve) OR (hieu van)) cac xuc ((van hanh) or (ban hanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. ((hieu ve) OR (hieu van)) cac xuc ((van hanh) or (ban hanh)) vai cua tre*.