Perhaps you should try some spelling variations:
"literatura maria de isaac." » "literatura america de isaac.", "literatura memoria de isaac.", "literatura musica de isaac.", "literatura maria del isaac."
"literatura de de islam." » "literatura de del islam.", "literatura de e islam.", "literatura de de ilam.", "literatura de fe islam.", "literatura de di islam."
"literatura de de isla." » "literatura de fe isla.", "literatura de di isla."

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