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 arab _ islam.", "literature arabes e islam."
"literatura arte un islam." » "literatura arabe un islam.", "literatura breve un islam.", "literatura entre un islam.", "literatura arte el islam.", "literatura arte al islam.", "literatura arte una islam.", "literatura parte un islam.", "literatura arte en islam."
"literatura arte _ islam." » "literatura arabe _ islam.", "literatura breve _ islam.", "literatura entre _ islam."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("literature arab e islam.") or ((("literatura arte un islam.") OR ("literatura arte _ islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literature arab e islam.") OR ((("literatura arte un islam.") OR ("literatura arte _ islam.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literature arab e islam.\") or (((\"literatura arte un islam.\") OR (\"literatura arte _ islam.\"))))".
• Removing quotes may allow a broader search: (( literature arab e islam. ) or ((( literatura arte un islam. ) OR ( literatura arte _ islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literature arab e islam.") or ((("literatura arte un islam.") OR ("literatura arte _ islam."))))*.