Perhaps you should try some spelling variations:
"literatura del ebro islam." » "literatura en ebro islam.", "literatura del libro islam.", "literatura del error islam."
"literatura de fe islam." » "literatura de e islam.", "literatura de del islam.", "literatura de el islam."
"literatura de de islam." » "literatura de del islam.", "literatura de de isla.", "literatura de e islam.", "literatura de di islam."

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

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