Perhaps you should try some spelling variations:
"literatura breve de isaac." » "literatura de de isaac.", "literatura en de isaac.", "literatura e de isaac."
"literatura del x islam." » "literatura de x islam.", "literatura en x islam.", "literatura del e islam.", "literatura del _ islam.", "literatura del el islam.", "literatura del xx islam.", "literatura del xv islam.", "literatura del xi islam."
"literatura es x islam." » "literatura en x islam.", "literatura e x islam.", "literatura el x islam.", "literatura es e islam.", "literatura es _ islam.", "literatura es el islam.", "literatura des x islam.", "literatura es y 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 breve de isaac.") or ((("literatura del x islam.") or ("literatura es x islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura breve de isaac.") OR ((("literatura del x islam.") OR ("literatura es x islam.")))).
• Removing quotes may allow a broader search: (( literatura breve de isaac. ) or ((( literatura del x islam. ) or ( literatura es x islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura breve de isaac.") or ((("literatura del x islam.") or ("literatura es x islam."))))*.