Perhaps you should try some spelling variations:
quang quan » quang tuan, quang uan, quan quan
trien hoat » tien hoa
hieu luat » hieu qua
dinh dung » dinh duong, dinh hung, tinh dung
van trien » van tien, va trien, van tren
quan li » quan ly, quan tri
li hieu » ly hieu, le hieu, li hien
tinh » trinh, kinh
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 or minh) quang quan li hieu luat ) or ( dinh dung luan van trien hoat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( (tinh OR minh) quang quan li hieu luat ) OR ( dinh dung luan van trien hoat )).
• Adding a wildcard symbol may retrieve word variants: (( (tinh or minh) quang quan li hieu luat ) or ( dinh dung luan van trien hoat ))*.