Perhaps you should try some spelling variations:
"literatura arabes e isla." » "literatura arabe e isla.", "literatura arte e isla.", "literature arab e isla.", "literatura arabes e islas.", "literatura arabes de isla.", "literatura arabes e islam."
"literatura en _ isaac." » "literatura espana _ isaac."
"literatura de del islam." » "literatura de el islam."

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