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 del en isaac." » "literatura en en isaac.", "literatura del de isaac.", "literatura del _ isaac.", "literatura del c isaac.", "literatura del eln isaac.", "literatura del ent isaac.", "literatura del el isaac."
"literatura de e isaac." » "literatura de de isaac.", "literatura de _ isaac.", "literatura de c isaac.", "literatura de el isaac.", "literatura de fe 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 del en isaac.") or ("literatura de e isaac."))) or ("literatura arabes y isla."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura del en isaac.") OR ("literatura de e isaac."))) OR ("literatura arabes y isla.")).
• Removing quotes may allow a broader search: (((( literatura del en isaac. ) or ( literatura de e isaac. ))) or ( literatura arabes y isla. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura del en isaac.") or ("literatura de e isaac."))) or ("literatura arabes y isla."))*.