Perhaps you should try some spelling variations:
"cong trinh luan van thi cong nhat luong" » "cong trinh luat van thi cong nhat luong", "cong trinh quan van thi cong nhat luong", "cong trinh toan van thi cong nhat luong", "cong trinh luan van thi cong chat luong", "cong trinh luan van thi cong nhat huong", "cong trinh luan van thi cong nhat thuong", "cong trinh luan van thi cong nhan luong", "cong trinh luan van thi cong ha luong", "cong trinh luan van thi dang nhat luong", "cong trinh luan van tai cong nhat luong", "cong trinh luan van thien cong nhat luong", "cong trinh luan dan thi cong nhat luong", "cong trinh luan tran thi cong nhat luong"
"cong trinh han van thu cong suat luong" » "cong trinh han van thu cong suat huong", "cong trinh han van thu cong chat luong", "cong trinh han van thu cong suat thong", "cong trinh quan van thu cong suat luong", "cong trinh han van thu nang suat luong", "cong trinh han van thu cong san luong", "cong trinh han van thu cong cua luong", "cong trinh phan van thu cong suat luong", "cong trinh nhan van thu cong suat luong", "cong trinh hanh van thu cong suat luong"

Try widening your search to All Fields.

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 thi cong nhat luong") or ("cong trinh han van thu cong suat luong"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("cong trinh luan van thi cong nhat luong") OR ("cong trinh han van thu cong suat luong")).
• Removing quotes may allow a broader search: (( cong trinh luan van thi cong nhat luong ) or ( cong trinh han van thu cong suat luong )).
• Adding a wildcard symbol may retrieve word variants: (("cong trinh luan van thi cong nhat luong") or ("cong trinh han van thu cong suat luong"))*.