Perhaps you should try some spelling variations:
quang quan » quang tuan, quang uan, quan quan
tinh dung » trinh dung, tin dung, tinh huong
kien soat » kiem soat, bien soan, kien hoa
hieu soat » hieu hoat, hieu luat, kiem soat
hieu suat » hieu luat, hieu qua
van kien » van tien, van hien, van chien
quan van » quan va, quan luan, quan doan
luan » 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 kien soat ) or ( tinh quang quan van ((hieu soat) or (hieu suat)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van kien soat ) OR ( tinh quang quan van ((hieu soat) OR (hieu suat)) )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van kien soat ) or ( tinh quang quan van ((hieu soat) or (hieu suat)) ))*.