Perhaps you should try some spelling variations:
"literatura arabe e islam." » "literatura breve e islam.", "literatura e e islam.", "literatura al e islam.", "literatura arabes e islam.", "literatura arabe de islam.", "literatura arabe en islam.", "literatura arabe e islas.", "literatura arabe del islam."
"literatura en el islam." » "literatura espana el islam."
"literatura de e islam." » "literatura de e islas.", "literatura de del islam.", "literatura de el islam.", "literatura de fe islam.", "literatura de _ islam."

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