Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao suc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
va cao » va cac, va co, va dao

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