Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
cua tre » cua te, cuu tre, cua triet
hanh va » hang va, hanh vi
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao suc
nang xa » nang x, lang xa, nang ma
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa
tu ban » thu ban, te ban
tu bai » tu bat, te bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu bai) OR (tu ban)) ky nang xa hoi. hieu va cao tuc va ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bai) OR (tu ban)) ky nang xa hoi. hieu va cao tuc va ((hanh vai) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu bai) OR (tu ban)) ky nang xa hoi. hieu va cao tuc va ((hanh vai) or (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu bai) OR (tu ban)) ky nang xa hoi. hieu va cao tuc va ((hanh vai) or (hanh va)) cua tre*.