Perhaps you should try some spelling variations:
cuong quan » luong quan, vuong quan, luong quang
minh cuong » dinh cuong, manh cuong, minh tuong
hieu soat » hieu suat, hieu hoat, hieu luat
thien van » thi van
van hieu » cao hieu
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: (( (tin or tinh) dung luan van hieu soat ) or ( minh cuong quan van ((dien hoa) or (thien van)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( (tin OR tinh) dung luan van hieu soat ) OR ( minh cuong quan van ((dien hoa) OR (thien van)) )).
• Adding a wildcard symbol may retrieve word variants: (( (tin or tinh) dung luan van hieu soat ) or ( minh cuong quan van ((dien hoa) or (thien van)) ))*.