Perhaps you should try some spelling variations:
quang quan » quang tuan, quang uan, quan quan
tinh dung » trinh dung, tin dung, tinh huong
quang cao » nang cao, quang nam
hieu suat » hieu luat, hieu qua
luan kiem » luat kiem, khuan kiem, luong kiem
kiem soat » kiem toan
juan cao » toan cao, quan cau, juan a

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

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