Perhaps you should try some spelling variations:
quang quang » quan quang, dang quang, dung quang
quang cao » nang cao, quang nam
hieu soat » hieu hoat, hieu luat, kiem soat
hieu suat » hieu luat, hieu qua
kien toan » kiem toan, dien toan, thien toan
van kien » van tien, van hien, van chien
tinh » trinh, dinh, minh
luan » quan, lan

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: (( tinh quang quang cao ((hieu soat) OR (hieu suat)) ) OR ( tin dung luan van kien toan ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh quang quang cao ((hieu soat) OR (hieu suat)) ) or ( tin dung luan van kien toan ))~".
• Adding a wildcard symbol may retrieve word variants: (( tinh quang quang cao ((hieu soat) OR (hieu suat)) ) or ( tin dung luan van kien toan ))*.