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 des un islam." » "literatura de un islam.", "literatura del un islam.", "literatura es un islam.", "literatura des el islam.", "literatura des al islam.", "literatura des _ islam.", "literatura des en islam."
"literatura e de isla." » "literatura de de isla.", "literatura en de isla.", "literatura del de isla.", "literatura e de isaac.", "literatura y de isla.", "literatura _ de isla."

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