Perhaps you should try some spelling variations:
tinh khong » tinh khang, tinh huong, benh khong
khong quan » thong quan, hong quan, thong quang
quan doan » quan hoang, chuan doan, chan doan
doan kiem » toan kiem, hoan kiem, doan dieu
kiem soat » kiem toan
quan doi » quan tri, quan li
quan vi » quan li, quan tri

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh quang ((quan vi) OR (quan doi)) hieu qua ) or ( tinh khong quan doan kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quang ((quan vi) OR (quan doi)) hieu qua ) OR ( tinh khong quan doan kiem soat ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh quang ((quan vi) OR (quan doi)) hieu qua ) or ( tinh khong quan doan kiem soat ))*".