Perhaps you should try some spelling variations:
"literatura arabe e islam." » "literatura breve e islam.", "literatura de e islam.", "literatura e e islam.", "literatura arabes e islam.", "literatura arabe de islam.", "literatura arabe en islam.", "literatura arabe el islam.", "literatura arabe del islam."
"literature arab _ islam." » "literature early _ islam.", "literatura para _ islam.", "literatura arte _ islam."
"literature arab e islas." » "literature early e islas.", "literatura para e islas.", "literatura arte e islas.", "literature arab el islam.", "literature arabes e islas.", "literature arabe de islas.", "literature arabe en islas."

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