Perhaps you should try some spelling variations:
"literatura en de isla." » "literatura espana de isla.", "literatura en de isaac."
"literatura o del islam." » "literatura e del islam.", "literatura a del islam.", "literatura _ del islam.", "literatura o el islam.", "literatura y del islam.", "literatura o de islam."
"literatura de de ilam." » "literatura de de islam.", "literatura de de chilam.", "literatura de fe ilam.", "literatura de di ilam."

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