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

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tests ((stable state) OR (stable states)) ((de filosofia) OR (e filosofia)) da literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tests ((stable state) or (stable states)) ((de filosofia) OR (e filosofia)) da literatura".
• Adding a wildcard symbol may retrieve word variants: tests ((stable state) or (stable states)) ((de filosofia) OR (e filosofia)) da literatura*.