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 el islam.", "literatura arabi e islas."
"literatura en del islam." » "literatura de del islam.", "literatura espana del islam.", "literatura den del islam.", "literatura deln del islam.", "literatura en el islam."
"literatura e en islam." » "literatura de en islam.", "literatura del en islam.", "literatura e el islam.", "literatura e un islam.", "literatura e en ilam.", "literatura fe en islam.", "literatura en en islam."

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