Perhaps you should try some spelling variations:
tinh huong » dinh huong, anh huong
dung danh » dung doanh, dung dan, cuong danh
kiem soat » kiem toan
hieu soat » hieu suat, hieu hoat, hieu luat
danh van » doanh van, dang van, dinh van
van kiem » va kiem, van kien, van hien
van hieu » cao hieu
lam van » lam san, nam van, dam van

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: (( trinh dung danh van kiem soat ) OR ( ((tinh huong) OR (tinh quang)) lam van hieu soat ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( trinh dung danh van kiem soat ) or ( ((tinh huong) OR (tinh quang)) lam van hieu soat ))~".
• Adding a wildcard symbol may retrieve word variants: (( trinh dung danh van kiem soat ) or ( ((tinh huong) OR (tinh quang)) lam van hieu soat ))*.