Perhaps you should try some spelling variations:
"literatura caribe y isaac." » "literatura arabe y isaac.", "literatura arte y isaac.", "literatura maria y isaac.", "literatura caribe _ isaac.", "literatura caribe c isaac.", "literatura caribe e isaac."
"literatura e de isla." » "literatura de de isla.", "literatura en de isla.", "literatura del de isla.", "literatura e de isaac.", "literatura y de isla.", "literatura o de isla."
"literatura _ de isla." » "literatura _ de isaac."

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 e de isla.") OR ("literatura _ de isla."))) OR ("literatura caribe y isaac."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"literatura e de isla.\") OR (\"literatura _ de isla.\"))) or (\"literatura caribe y isaac.\"))~".
• Removing quotes may allow a broader search: (((( literatura e de isla. ) OR ( literatura _ de isla. ))) or ( literatura caribe y isaac. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("literatura e de isla.") OR ("literatura _ de isla."))) or ("literatura caribe y isaac."))*.