Perhaps you should try some spelling variations:
"literatura de dos calas." » "literatura de dos caras.", "literatura de dos escalas.", "literatura de dos cartas.", "literatura de datos calas."
"literatura _ de islam." » "literatura _ del islam.", "literatura _ de isla.", "literatura _ e islam."
"literatura de de isaac." » "literatura de fe 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 dos calas.") or ("literatura _ de islam."))) or ("literatura de de isaac."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de dos calas.") OR ("literatura _ de islam."))) OR ("literatura de de isaac."))*.
• Removing quotes may allow a broader search: (((( literatura de dos calas. ) or ( literatura _ de islam. ))) or ( literatura de de isaac. ))*.