Perhaps you should try some spelling variations:
"literatura espana e islam." » "literatura espanola e islam.", "literatura mexicana e islam.", "literatura espana en islam.", "literatura espana el islam.", "literatura espana e islas.", "literatura espana del islam."
"literatura a un islam." » "literatura al un islam.", "literatura e un islam.", "literatura de un islam.", "literatura a el islam.", "literatura a al islam.", "literatura a _ islam."
"literatura a de islam." » "literatura al de islam.", "literatura e de islam.", "literatura de de islam.", "literatura a del islam.", "literatura a de isla.", "literatura a de ilam.", "literatura a de islas.", "literatura a ddel islam.", "literatura y de islam.", "literatura _ de islam.", "literatura o de islam."

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