Perhaps you should try some spelling variations:
"literatura arabes el islam." » "literatura arabe el islam.", "literatura arte el islam.", "literature arab el islam.", "literatura arabes e islam.", "literatura arabes en islam.", "literatura arabes em islam."
"literatura arabe el or arabes del islam." » "literatura arabe el or arabes de islam.", "literatura arabe el or arribes del islam.", "literatura arabe el or arabes e islam.", "literatura arabe en or arabes del islam.", "literatura arabe e or arabes del islam.", "literatura arabe et or arabes del islam."

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