Perhaps you should try some spelling variations:
tinh trang » tinh quang, tinh toan, tinh thanh
minh trang » minh hoang, minh tuan, minh quang
trien hoat » tien hoa
hieu soat » hieu suat, hieu hoat, hieu luat
quang van » quang ban, quan van, quang uan
van trien » van tien, va trien, van tren
van hieu » cao hieu
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: (( trinh dung luan van hieu soat ) or ( ((tinh trang) or (minh trang)) quang van trien hoat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dung luan van hieu soat ) OR ( ((tinh trang) OR (minh trang)) quang van trien hoat )).
• Adding a wildcard symbol may retrieve word variants: (( trinh dung luan van hieu soat ) or ( ((tinh trang) or (minh trang)) quang van trien hoat ))*.