Perhaps you should try some spelling variations:
"literatura arabes e islas." » "literatura arabe e islas.", "literatura arte e islas.", "literature arab e islas.", "literatura arabes el islam."
"literatura del de isaac." » "literatura de de isaac.", "literatura en de isaac.", "literatura del den isaac.", "literatura del d_ isaac.", "literatura del dc isaac.", "literatura del dean isaac."
"literatura e e isaac." » "literatura de e isaac.", "literatura en e isaac.", "literatura e en isaac.", "literatura e _ isaac.", "literatura e c isaac.", "literatura e de isaac.", "literatura el 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 e isaac.") or ("literatura del de isaac."))) or ("literatura arabes e islas."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura e e isaac.") OR ("literatura del de isaac."))) OR ("literatura arabes e islas.")).
• Removing quotes may allow a broader search: (((( literatura e e isaac. ) or ( literatura del de isaac. ))) or ( literatura arabes e islas. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura e e isaac.") or ("literatura del de isaac."))) or ("literatura arabes e islas."))*.