Perhaps you should try some spelling variations:
trang luan » tang luan, trang tuan, truong luan
tranh luan » trinh luan, trinh luat, doanh luan
dung quan » dung quang, dung luan, luong quan
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
van kiem » va kiem, van kien, van hieu
quan su » quan cua
su hieu » su hien, su tieu, su bieu
tin » tinh

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: (( tin dung quan su hieu soat ) OR ( trinh ((trang luan) OR (tranh luan)) van kiem soat ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tin dung quan su hieu soat ) or ( trinh ((trang luan) OR (tranh luan)) van kiem soat ))~".
• Adding a wildcard symbol may retrieve word variants: (( tin dung quan su hieu soat ) or ( trinh ((trang luan) OR (tranh luan)) van kiem soat ))*.