Perhaps you should try some spelling variations:
literatura arabe » literatura breve, literatura de, literatura e
literatura es » literatura en, literatura e, literatura el
en isaac » de isaac, _ isaac, c isaac
e isaac » de isaac, _ isaac, c isaac
e islam » el islam, e islas, del islam
e isla » e islas, de isla, e isela

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( literatura arabe ((e isaac) OR (en isaac)). ) OR ( literatura es ((e isla) OR (e islam)). ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( literatura arabe ((e isaac) OR (en isaac)). ) or ( literatura es ((e isla) or (e islam)). ))~".
• Adding a wildcard symbol may retrieve word variants: (( literatura arabe ((e isaac) OR (en isaac)). ) or ( literatura es ((e isla) or (e islam)). ))*.