Perhaps you should try some spelling variations:
die filosofia » di filosofia, de filosofia, e filosofia
da literatura » la literatura, a literatura, de literatura
stable state » stable states, mutable state, unstable states
filosofia da » filosofia de, filosofia del, filosofia e

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tests ((stable state) OR (stable sets)) die filosofia da literatura".
• Adding a wildcard symbol may retrieve word variants: tests ((stable state) OR (stable sets)) die filosofia da literatura*.