Perhaps you should try some spelling variations:
"literatura espana del islam." » "literatura espanola del islam.", "literatura mexicana del islam.", "literatura enspana del islam.", "literatura delspana del islam.", "literatura espana de islam.", "literatura espana el islam."
"literatura e de isaac." » "literatura en de isaac.", "literatura del de isaac.", "literatura de de isaac.", "literatura y de isaac.", "literatura _ de isaac."
"literatura de mi isaac." » "literatura de _ isaac.", "literatura de c isaac.", "literatura de e isaac."

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: (((("literatura e de isaac.") or ("literatura de mi isaac."))) or ("literatura espana del islam."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura e de isaac.") OR ("literatura de mi isaac."))) OR ("literatura espana del islam.")).
• Removing quotes may allow a broader search: (((( literatura e de isaac. ) or ( literatura de mi isaac. ))) or ( literatura espana del islam. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura e de isaac.") or ("literatura de mi isaac."))) or ("literatura espana del islam."))*.