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

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