Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
nhat luong » chat luong, nhat huong, nhat thuong
chat duong » chat luong, chat huong, hai duong
van thien » van tien, van hien, van chien
cong nhat » cong nhan, cong ha, cong suat
van nhiet » va nhiet, dan nhiet, van thiet
dong chat » cong chat, dung chat, don chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( cong trinh luan van thien cong nhat luong ) or ( cong trinh luan van nhiet dong chat duong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong trinh luan van thien cong nhat luong ) OR ( cong trinh luan van nhiet dong chat duong )).
• Adding a wildcard symbol may retrieve word variants: (( cong trinh luan van thien cong nhat luong ) or ( cong trinh luan van nhiet dong chat duong ))*.