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

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