Perhaps you should try some spelling variations:
"literatura el _ isaac." » "literatura del _ isaac.", "literatura en _ isaac.", "literatura de _ isaac.", "literatura enl _ isaac.", "literatura dell _ isaac."
"literatura e el islam." » "literatura de el islam.", "literatura en el islam.", "literatura del el islam.", "literatura es el islam."
"literatura mexicana e islam." » "literatura mexicana de islam.", "literatura mexicana en islam.", "literatura mexicana el islam.", "literatura mexicana e islas.", "literatura mexicana del islam."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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