Perhaps you should try some spelling variations:
"cong trinh luan van thi cong khan thuong" » "cong trinh luan van thi cong khanh thuong", "cong trinh luan van thi cong phan thuong", "cong trinh luan van thi cong han thuong", "cong trinh luat van thi cong khan thuong", "cong trinh quan van thi cong khan thuong", "cong trinh han van thi cong khan thuong", "cong trinh luan van thi cong nhan thuong", "cong trinh luan van tai cong khan thuong", "cong trinh luan van thien cong khan thuong", "cong trinh luan dan thi cong khan thuong", "cong trinh luan tran thi cong khan thuong"
"cong trinh luan van thu cong khan thuong" » "cong trinh luan van thu cong khanh thuong", "cong trinh luan van thu cong phan thuong", "cong trinh luan van thu cong han thuong", "cong trinh luat van thu cong khan thuong", "cong trinh quan van thu cong khan thuong", "cong trinh han van thu cong khan thuong", "cong trinh luan van thu cong nhan thuong"

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 khan thuong") OR ("cong trinh luan van thu cong khan thuong"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"cong trinh luan van thi cong khan thuong\") OR (\"cong trinh luan van thu cong khan thuong\"))".
• Removing quotes may allow a broader search: (( cong trinh luan van thi cong khan thuong ) OR ( cong trinh luan van thu cong khan thuong )).
• Adding a wildcard symbol may retrieve word variants: (("cong trinh luan van thi cong khan thuong") OR ("cong trinh luan van thu cong khan thuong"))*.