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