Perhaps you should try some spelling variations:
"literatura breve de isaac." » "literatura en de isaac.", "literatura del de isaac.", "literatura e de isaac."
"literatura de ix islam." » "literatura de el islam.", "literatura de e islam.", "literatura de al islam.", "literatura de ir islam.", "literatura de ia islam.", "literatura de im islam."
"literatura de ex islam." » "literatura de el islam.", "literatura de e islam.", "literatura de del islam.", "literatura de en islam.", "literatura de ee islam."

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 de ix islam.") OR ("literatura de ex islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura breve de isaac.") OR ((("literatura de ix islam.") OR ("literatura de ex islam.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura breve de isaac.\") or (((\"literatura de ix islam.\") OR (\"literatura de ex islam.\"))))".
• Removing quotes may allow a broader search: (( literatura breve de isaac. ) or ((( literatura de ix islam. ) OR ( literatura de ex islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura breve de isaac.") or ((("literatura de ix islam.") OR ("literatura de ex islam."))))*.