Perhaps you should try some spelling variations:
quang quan » quang tuan, quang uan, quan quan
dinh luong » dinh duong, dinh huong, dinh cuong
luong quan » thong quan, duong qua
hieu suat » hieu luat, hieu qua
quan doan » quan hoang, chuan doan, chan doan
doan kiem » toan kiem, hoan kiem, doan dieu
kiem soat » kiem toan
hieu so » thieu so
tinh » trinh, minh, kinh

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 luan ((hieu so) or (hieu suat)) ) or ( dinh luong quan doan kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quang quan luan ((hieu so) OR (hieu suat)) ) OR ( dinh luong quan doan kiem soat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh quang quan luan ((hieu so) or (hieu suat)) ) or ( dinh luong quan doan kiem soat ))*.