Perhaps you should try some spelling variations:
"literatura del de isaias." » "literatura de de isaias.", "literatura del de indias.", "literatura del dean isaias."
"literatura en de isaac." » "literatura de de isaac.", "literatura espana de isaac."
"literatura 1o del islam." » "literatura 10 del islam.", "literatura con del islam.", "literatura de del islam.", "literatura 1o el islam.", "literatura 1o de islam."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("literatura en de isaac.") or ("literatura del de isaias."))) or ("literatura 1o del islam."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura en de isaac.") OR ("literatura del de isaias."))) OR ("literatura 1o del islam.")).
• Removing quotes may allow a broader search: (((( literatura en de isaac. ) or ( literatura del de isaias. ))) or ( literatura 1o del islam. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura en de isaac.") or ("literatura del de isaias."))) or ("literatura 1o del islam."))*.