Perhaps you should try some spelling variations:
"literatura america e isaac." » "literatura americana e isaac.", "literatura mexicana e isaac.", "literatura alemana e isaac.", "literatura america en isaac.", "literatura america de isaac.", "literatura america el isaac.", "literatura america _ isaac."
"literatura de de islas." » "literatura de e islas.", "literatura de de islam.", "literatura de de isaias.", "literatura de de isaacs.", "literatura de fe islas.", "literatura de di islas."
"literatura _ de isla." » "literatura _ de isaac."

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 de de islas.") OR ("literatura _ de isla."))) OR ("literatura america e isaac."))~.
• Removing quotes may allow a broader search: (((( literatura de de islas. ) or ( literatura _ de isla. ))) or ( literatura america e isaac. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura de de islas.") or ("literatura _ de isla."))) or ("literatura america e isaac."))*.