Perhaps you should try some spelling variations:
"literatura espana e islam." » "literatura espanola e islam.", "literatura mexicana e islam.", "literatura espana en islam.", "literatura espana el islam.", "literatura espana e islas.", "literatura espana del islam."
"literatura el de isaac." » "literatura del de isaac.", "literatura en de isaac.", "literatura e de isaac."
"literatura de fe isla." » "literatura de de isla.", "literatura de e isla.", "literatura de de islam."

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