Perhaps you should try some spelling variations:
"literature arab e islam." » "literatura arabe e islam.", "literature early e islam.", "literatura para e islam.", "literature arab el islam.", "literature arab e islas.", "literature arab del islam.", "literature arabe e islam.", "literature arab _ islam.", "literature arabes e islam."
"literatura del de islam." » "literatura en de islam.", "literatura del del islam.", "literatura del de isla.", "literatura del de ilam.", "literatura del de islas.", "literatura del ddel islam.", "literatura del dean islam."
"literatura de e isaac." » "literatura de de isaac.", "literatura de en isaac.", "literatura de _ isaac.", "literatura de el isaac.", "literatura de fe isaac."

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("literatura de e isaac.") or ("literatura del de islam."))) or ("literature arab e islam."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de e isaac.") OR ("literatura del de islam."))) OR ("literature arab e islam.")).
• Removing quotes may allow a broader search: (((( literatura de e isaac. ) or ( literatura del de islam. ))) or ( literature arab e islam. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura de e isaac.") or ("literatura del de islam."))) or ("literature arab e islam."))*.