Perhaps you should try some spelling variations:
dang xay » dang van, van xay
van hanh » van thanh, ban hanh, van anh
lang xa » lang ha, lang van
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
va cam » va cham, va cac, va cao
vi cua » vai cua
di cua » dai cua, doi cua, de 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 cac ky ((lang xa) OR (dang xay)) hoi. hieu va cam xuc van hanh ((vi cua) OR (di cua)) tre~.
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((lang xa) or (dang xay)) hoi. hieu va cam xuc van hanh ((vi cua) or (di cua)) tre*.