Perhaps you should try some spelling variations:
"literatura arabi e islam." » "literatura arabe e islam.", "literature arab e islam.", "literatura para e islam.", "literatura arabi et islam.", "literatura carabi el islam.", "literatura arabi e islas.", "literatura arabi del islam."
"literatura en un islam." » "literatura de un islam.", "literatura espana un islam.", "literatura den un islam.", "literatura deln un islam.", "literatura en al islam.", "literatura en _ islam."
"literatura e el islam." » "literatura de el islam.", "literatura del el islam.", "literatura en el islam.", "literatura es el islam."

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