Perhaps you should try some spelling variations:
quang khang » quang khanh, quang thanh, quang khai
duong tinh » duong minh, duong sinh, dong tinh
minh quang » tinh quang, dinh quang, minh hoang
tinh luan » trinh luan, binh luan, minh luan
khang van » khanh van, khong van, khang chan
hieu soat » hieu suat, hieu hoat, hieu luat
van hieu » cao hieu
van so » van son, van soa, van su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( dinh duong tinh luan van so ) or ( minh quang khang van hieu soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( dinh duong tinh luan van so ) OR ( minh quang khang van hieu soat )).
• Adding a wildcard symbol may retrieve word variants: (( dinh duong tinh luan van so ) or ( minh quang khang van hieu soat ))*.