Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu luc » hieu luat, hieu qua
luc tham » luc tam, duc tham, luc thap
tham xuc » tham nuoc, tham thuc, pham duc
ban hang » ngan hang
tu cach » tu cac
vai cua » dai cua, hai cua, lai cua
cach tu » cach thuc
xang xa » lang xa, mang xa, ang xa
tu xang » ty xang, tu lang, tu quang
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach tu xang xa hoi. hieu luc tham xuc ((van hanh) or (ban hang)) ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu xang xa hoi. hieu luc tham xuc ((van hanh) OR (ban hang)) ((vi cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu cach tu xang xa hoi. hieu luc tham xuc ((van hanh) or (ban hang)) ((vi cua) or (vai cua)) tre*.