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 suc, cao toc
cao duc » dao duc, cao suc, giao duc
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
vi cua » vai cua, di 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 san ky nang xa hoi. hieu va ((cao tuc) OR (cao duc)) ((va danh) or (va hanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang xa hoi. hieu va ((cao tuc) OR (cao duc)) ((va danh) OR (va hanh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang xa hoi. hieu va ((cao tuc) OR (cao duc)) ((va danh) or (va hanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang xa hoi. hieu va ((cao tuc) OR (cao duc)) ((va danh) or (va hanh)) vi cua te*.