Perhaps you should try some spelling variations:
"literatura del de isla." » "literatura de de isla.", "literatura en de isla.", "literatura del de isaac.", "literatura del dean isla."
"literatura o de islam." » "literatura e de islam.", "literatura a de islam.", "literatura _ de islam.", "literatura o del islam.", "literatura o e islam.", "literatura o de ilam.", "literatura o de isaacm."
"literatura y de islam." » "literatura y del islam.", "literatura y e islam.", "literatura y de ilam.", "literatura y de isaacm."

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