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