Perhaps you should try some spelling variations:
trinh tang » trinh trang, trinh tong, trinh bang
dung quan » dung quang, dung luan, luong quan
hieu suat » hieu luat, hieu qua
kiem soat » kiem toan
quan so » quan su, quan ao, quan doi
so hieu » co hieu, so dieu, so lieu
luan va » luat va
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 so hieu suat ) OR ( trinh tang ((luan va) OR (luan van)) kiem soat ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tin dung quan so hieu suat ) or ( trinh tang ((luan va) OR (luan van)) kiem soat ))~".
• Adding a wildcard symbol may retrieve word variants: (( tin dung quan so hieu suat ) or ( trinh tang ((luan va) OR (luan van)) kiem soat ))*.