Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam tu » cam thu, nam tu, dam tu
tu van » tu va
cua te » cua tu

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

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