Perhaps you should try some spelling variations:
"literatura arabe et islam." » "literatura breve et islam.", "literatura al et islam.", "literatura arabe en islam.", "literatura arabe e islam.", "literatura arabe el islam.", "literatura arabe del islam.", "literatura arabe e islas."
"literatura e el islam." » "literatura en el islam.", "literatura del el islam.", "literatura es el islam.", "literatura el el islam."
"literatura de el islam." » "literatura den el islam.", "literatura des el islam.", "literatura del el islam."

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