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 e e isaac." » "literatura en e isaac.", "literatura del e isaac.", "literatura e de isaac.", "literatura e en isaac.", "literatura e _ isaac.", "literatura de e isaac.", "literatura el e isaac."
"literatura de di islamm." » "literatura de de islam.", "literatura de mi islamm.", "literatura de si islamm."

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