Perhaps you should try some spelling variations:
phuong doan » phuong loan, phuong hoang, huong dan
huong loan » phuong loan, huong lan, huong dan
dung nang » dun nang, dung dang, dung quang
kiem soat » kiem toan
nang van » dang van, tang van, lang van
van kiem » va kiem, van kien, van hien
van hieu » cao hieu
qua » quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh dung nang van kiem soat ) or ( tinh ((huong loan) OR (phuong doan)) van hieu qua ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dung nang van kiem soat ) OR ( tinh ((huong loan) OR (phuong doan)) van hieu qua )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( trinh dung nang van kiem soat ) or ( tinh ((huong loan) OR (phuong doan)) van hieu qua ))".
• Adding a wildcard symbol may retrieve word variants: (( trinh dung nang van kiem soat ) or ( tinh ((huong loan) OR (phuong doan)) van hieu qua ))*.