Perhaps you should try some spelling variations:
"literatura de de islam." » "literatura de del islam.", "literatura de e islam.", "literatura de de ilam.", "literatura de de isaacm.", "literatura de fe islam.", "literatura de di islam."
"literatura _ de islam." » "literatura _ del islam.", "literatura _ e islam.", "literatura _ de ilam.", "literatura _ de isaacm."
"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 _ de islam.") OR ("literatura _ de isla."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura de de islam.\") or (((\"literatura _ de islam.\") OR (\"literatura _ de isla.\"))))~".
• Removing quotes may allow a broader search: (( literatura de de islam. ) or ((( literatura _ de islam. ) OR ( literatura _ de isla. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("literatura de de islam.") or ((("literatura _ de islam.") OR ("literatura _ de isla."))))*.