Perhaps you should try some spelling variations:
"cong trinh luan van thi nang suat luong" » "cong trinh luat van thi nang suat luong", "cong trinh han van thi nang suat luong", "cong trinh toan van thi nang suat luong", "cong trinh luan van thi nang suat huong", "cong trinh luan van thi nang chat luong", "cong trinh luan van thi nang suat thong", "cong trinh luan van thi cong suat luong", "cong trinh luan van ki nang suat luong", "cong trinh luan van thi hanh suat luong", "cong trinh luan van tai nang suat luong", "cong trinh luan dan thi nang suat luong", "cong trinh luan tran thi nang suat luong"
"cong trinh quan van thu cong cua luong" » "cong tinh quang van thu cong cua luong", "cong trinh luat van thu cong cua luong", "cong trinh han van thu cong cua luong", "cong trinh quan van thu cong cu luong", "cong trinh quan van thu cong cua huong", "cong trinh quan van thu cong chat luong", "cong trinh quan va thu cong cua luong", "cong trinh quan luan thu cong cua luong", "cong trinh quan doan thu cong cua luong", "cong trinh quan van thu dong cua luong", "cong trinh quan van thu huong cua 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 nang suat luong") or ("cong trinh quan van thu cong cua luong"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("cong trinh luan van thi nang suat luong") OR ("cong trinh quan van thu cong cua luong")).
• Removing quotes may allow a broader search: (( cong trinh luan van thi nang suat luong ) or ( cong trinh quan van thu cong cua luong )).
• Adding a wildcard symbol may retrieve word variants: (("cong trinh luan van thi nang suat luong") or ("cong trinh quan van thu cong cua luong"))*.