Perhaps you should try some spelling variations:
"literatura en de islam." » "literatura de de islam.", "literatura espana de islam.", "literatura en del islam.", "literatura en de isla.", "literatura en e islam."
"literatura y de islam." » "literatura y del islam.", "literatura y de isla.", "literatura y e islam."
"literatura _ de islam." » "literatura _ del islam.", "literatura _ de isla.", "literatura _ e 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 en de islam.") or ("literatura y de islam."))) or ("literatura _ de islam."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura en de islam.") OR ("literatura y de islam."))) OR ("literatura _ de islam.")).
• Removing quotes may allow a broader search: (((( literatura en de islam. ) or ( literatura y de islam. ))) or ( literatura _ de islam. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura en de islam.") or ("literatura y de islam."))) or ("literatura _ de islam."))*.