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 dan thi cong khan thuong", "cong trinh luan van thu cong khan thuong"
"cong trinh luan van thien cong khan thuong" » "cong trinh luan van thien cong khanh thuong", "cong trinh luan van thien cong phan thuong", "cong trinh luan van thien cong han thuong", "cong trinh luat van thien cong khan thuong", "cong trinh quan van thien cong khan thuong", "cong trinh han van thien cong khan thuong", "cong trinh luan van thien cong nhan thuong", "cong trinh luan van tien cong khan thuong", "cong trinh luan van hien cong khan thuong", "cong trinh luan van chien cong khan thuong", "cong trinh luan van taien cong khan thuong", "cong trinh luan dan thien cong khan thuong", "cong trinh luan van thuen cong khan 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 thien 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 thien cong khan thuong\"))".
• Removing quotes may allow a broader search: (( cong trinh luan van thi cong khan thuong ) OR ( cong trinh luan van thien cong khan thuong )).
• Adding a wildcard symbol may retrieve word variants: (("cong trinh luan van thi cong khan thuong") OR ("cong trinh luan van thien cong khan thuong"))*.