Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
vi cua » di cua

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 can ky nang xa hoi. hieu qua cham ((luc va) OR (tuc va)) hanh ((vi cua) OR (vai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky nang xa hoi. hieu qua cham ((luc va) or (tuc va)) hanh ((vi cua) OR (vai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu can ky nang xa hoi. hieu qua cham ((luc va) or (tuc va)) hanh ((vi cua) OR (vai cua)) tre*.