Perhaps you should try some spelling variations:
ban hanh » ban hang
hieu va » lieu va, hieu qua
phat tu » phan tu, pham tu, phap tu
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
tu van » tu va
x hoi » xa hoi, o hoi, x ho

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

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