Perhaps you should try some spelling variations:
"literatura arabe un islam." » "literatura de un islam.", "literatura al un islam.", "literatura arabes un islam.", "literatura arabe en islam.", "literatura arabes en islam.", "literatura arabe el islam.", "literatura arabe e islam.", "literatura arabe al islam."
"literatura breve de islam." » "literatura de de islam.", "literatura en de islam.", "literatura del de islam.", "literatura breve del islam.", "literatura breve de isla.", "literatura breve e islam.", "literatura breve de islasm.", "literatura breve dde islam.", "literatura breve de islamm."
"literatura e e isla." » "literatura de e isla.", "literatura en e isla.", "literatura del e isla.", "literatura e e islas.", "literatura e de isla.", "literatura e e islam.", "literatura el e isla."

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