Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va
cam tu » cam thu, nam tu, dam tu
tu van » tu va
vi cua » vai cua
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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