Perhaps you should try some spelling variations:
quang tuan » quang thanh, quan luan, quang cua
dung quang » dang quang, dung quan, luong quang
quang cau » quang cao, quang cu, quan cau
hieu suat » hieu luat, hieu qua
kiem toan » ke toan, kiem tra
cau hieu » cao hieu, cau dieu, cau hien
tuan va » toan va, luan va, quan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh dung quang cau hieu suat ) or ( tinh quang tuan va ((kiem soat) or (kiem toan)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dung quang cau hieu suat ) OR ( tinh quang tuan va ((kiem soat) OR (kiem toan)) )).
• Adding a wildcard symbol may retrieve word variants: (( trinh dung quang cau hieu suat ) or ( tinh quang tuan va ((kiem soat) or (kiem toan)) ))*.