Perhaps you should try some spelling variations:
"literatura arabe e islam." » "literatura breve e islam.", "literatura de e islam.", "literatura e e islam.", "literatura arabes e islam.", "literatura arabe de islam.", "literatura arabe en islam.", "literatura arabe el islam.", "literatura arabe e islas.", "literatura arabe del islam."
"literatura arabe el OR arabe et islam." » "literatura arabe en OR arabe et islam.", "literatura arabes del OR arabe et islam.", "literatura caribe el OR arabe et islam.", "literatura arabe el OR arabe en islam.", "literatura arabe el OR arabi et islam.", "literatura arabe el OR arabes en islam.", "literatura arabes el OR arabes et islam.", "literatura arabe del OR arabe det islam.", "literatura arabe enl OR arabe ent islam."

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