Perhaps you should try some spelling variations:
"literature arab y isla." » "literatura arabe y isla.", "literature early y isla.", "literatura para y isla.", "literature arabe y isla.", "literature arab _ isla.", "literature arabes y isla.", "literature arab e isla."
"literatura de el isaac." » "literatura de en isaac.", "literatura de joel isaac.", "literatura de noel isaac.", "literatura de fel isaac.", "literatura de _l isaac.", "literatura de al isaac."
"literatura de e isaac." » "literatura de de isaac.", "literatura de en isaac.", "literatura de _ isaac.", "literatura de fe isaac.", "literatura de a 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 e isaac.") OR ("literatura de el isaac."))) OR ("literature arab y isla."))~.
• Removing quotes may allow a broader search: (((( literatura de e isaac. ) or ( literatura de el isaac. ))) or ( literature arab y isla. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura de e isaac.") or ("literatura de el isaac."))) or ("literature arab y isla."))*.