Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
va cam » va cham, va cac, va cao
vi cua » di 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 va cam tuc van hanh ((vi cua) or (((vai cua) OR (hai cua)))) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang x hoi. hieu va cam tuc van hanh ((vi cua) OR (((vai cua) OR (hai cua)))) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang x hoi. hieu va cam tuc van hanh ((vi cua) or (((vai cua) OR (hai cua)))) tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang x hoi. hieu va cam tuc van hanh ((vi cua) or (((vai cua) OR (hai cua)))) tre*.