Perhaps you should try some spelling variations:
"literatura arabe de isla." » "literatura breve de isla.", "literatura de de isla.", "literatura e de isla.", "literatura caribe de isla.", "literatura sabe de isla.", "literatura arabes e isla.", "literatura arabe de isaac."
"literatura arabe del or arabes del islam." » "literatura arabe del or arabes de islam.", "literatura arabe del or arribes del islam.", "literatura arabe del or arabes e islam.", "literatura arabe el or arabes del islam.", "literatura amable del or arabes del islam.", "literatura caribe del or arabes del islam.", "literatura sabe del or arabes del islam.", "literatura arabes el or arabes del islam."

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