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 dinh » van dinh, va kinh, va tinh
van cua » vang cua, dan cua, nan cua
ban cua » ban quan
tu cam » tu cham, tu nam, tu can
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa

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

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