Perhaps you should try some spelling variations:
"literatura arabe e islam." » "literatura breve e islam.", "literatura de e islam.", "literatura al 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 _ islam." » "literatura breve _ islam.", "literatura de _ islam.", "literatura al _ islam."
"literatura e _ islam." » "literatura de _ islam.", "literatura en _ islam.", "literatura del _ islam."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("literatura arabe e islam.") or ((("literatura arabe _ islam.") OR ("literatura e _ islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura arabe e islam.") OR ((("literatura arabe _ islam.") OR ("literatura e _ islam.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura arabe e islam.\") or (((\"literatura arabe _ islam.\") OR (\"literatura e _ islam.\"))))".
• Removing quotes may allow a broader search: (( literatura arabe e islam. ) or ((( literatura arabe _ islam. ) OR ( literatura e _ islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura arabe e islam.") or ((("literatura arabe _ islam.") OR ("literatura e _ islam."))))*.