Perhaps you should try some spelling variations:
nang xa » lang xa, nang ma, mang xa
va nhan » van nhan, ca nhan, va phan
vien do » vien da, bien do, tien do
do tren » dong tren, duoc tren, do trung
tu ban » thu ban, te ban
ban ky » van ky, dan ky
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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 ban ky ((nang xa) OR (nang x)) hoi. hieu ((ve cam) OR (ve cac)) duc va nhan vien do tren~.
• Adding a wildcard symbol may retrieve word variants: tu ban ky ((nang xa) or (nang x)) hoi. hieu ((ve cam) or (ve cac)) duc va nhan vien do tren*.