Perhaps you should try some spelling variations:
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
hanh va » hang va, hanh vi
va cua » va chua, via cua, ca cua
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 duc) OR (cao duc)) ban hanh va cua te~.
• 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 duc) OR (cao duc)) ban hanh va cua te.
• 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 duc) OR (cao duc)) ban hanh va cua te".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang xa hoi. ((hieu ve) or (hieu va)) ((cam duc) OR (cao duc)) ban hanh va cua te*.