Perhaps you should try some spelling variations:
"literatura en del islam." » "literatura espana del islam.", "literatura en el islam."
"literatura de de islam." » "literatura de e islam.", "literatura de de ilam.", "literatura de de islas.", "literatura de de isaacm.", "literatura de fe islam.", "literatura de di islam."
"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 islam.") OR ("literatura en del islam."))) OR ("literatura _ de isla."))~.
• Removing quotes may allow a broader search: (((( literatura de de islam. ) or ( literatura en del islam. ))) or ( literatura _ de isla. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura de de islam.") or ("literatura en del islam."))) or ("literatura _ de isla."))*.