Perhaps you should try some spelling variations:
quang tuan » quang thanh, quan luan, quang cua
tinh dung » trinh dung, tin dung, tinh huong
hieu suat » hieu qua
hieu luat » hieu qua
kiem soat » kiem toan
tuan va » toan va, luan va, quan va
va kiem » van kien
luan » quan, lan

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 luan van ((hieu suat) OR (hieu luat)) ) or ( tinh quang tuan va kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van ((hieu suat) OR (hieu luat)) ) OR ( tinh quang tuan va kiem soat )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung luan van ((hieu suat) OR (hieu luat)) ) or ( tinh quang tuan va kiem soat ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van ((hieu suat) OR (hieu luat)) ) or ( tinh quang tuan va kiem soat ))*.