Perhaps you should try some spelling variations:
tinh trang » tinh quang, tinh toan, tinh thanh
minh trang » minh hoang, minh tuan, minh quang
hieu soat » hieu suat, hieu hoat, hieu luat
quang van » quang ban, quan van, quang uan
tien soat » trien hoat, thien hoat, kiem soat
van hieu » cao hieu
van tien » toan tien, van tuan
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 tien soat ))~.
• 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 tien soat )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( trinh dung luan van hieu soat ) or ( ((tinh trang) OR (minh trang)) quang van tien soat ))".
• Adding a wildcard symbol may retrieve word variants: (( trinh dung luan van hieu soat ) or ( ((tinh trang) OR (minh trang)) quang van tien soat ))*.