Perhaps you should try some spelling variations:
"literatura caribe y islam." » "literatura arabe y islam.", "literatura arte y islam.", "literatura maria y islam.", "literatura caribe e islam.", "literatura caribe _ islam.", "literatura caribe el islam."
"literatura de fe isaac." » "literatura de e isaac.", "literatura de _ isaac.", "literatura de c isaac."
"literatura de de isaac." » "literatura de di isaac."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("literatura de de isaac.") OR ("literatura de fe isaac."))) or ("literatura caribe y islam."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de de isaac.") OR ("literatura de fe isaac."))) OR ("literatura caribe y islam."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"literatura de de isaac.\") OR (\"literatura de fe isaac.\"))) or (\"literatura caribe y islam.\"))*".
• Removing quotes may allow a broader search: (((( literatura de de isaac. ) OR ( literatura de fe isaac. ))) or ( literatura caribe y islam. ))*.