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 e isaac." » "literatura del e isaac.", "literatura en e isaac.", "literatura e e isaac.", "literatura el de isaac.", "literatura el en isaac.", "literatura el c isaac.", "literatura el el isaac."
"literatura el _ isaac." » "literatura del _ isaac.", "literatura en _ isaac.", "literatura 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 el e isaac.") OR ("literatura el _ isaac."))) or ("literatura arabes y isla."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura el e isaac.") OR ("literatura el _ isaac."))) OR ("literatura arabes y isla.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"literatura el e isaac.\") OR (\"literatura el _ isaac.\"))) or (\"literatura arabes y isla.\"))".
• Removing quotes may allow a broader search: (((( literatura el e isaac. ) OR ( literatura el _ isaac. ))) or ( literatura arabes y isla. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura el e isaac.") OR ("literatura el _ isaac."))) or ("literatura arabes y isla."))*.