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