Perhaps you should try some spelling variations:
"literatura arabes e islam." » "literatura arabe e islam.", "literatura arte e islam.", "literature arab e islam.", "literatura arabes el islam.", "literatura arabes e islas.", "literatura arabes del islam."
"literatura arabe del or arabe de islam." » "literatura arabes del or arabe de islam.", "literatura arabe el or arabe de islam.", "literatura amable del or arabe de islam.", "literatura caribe del or caribe de islam.", "literatura sabe del or sabe de islam.", "literatura arabe yl or arabe y islam."

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