Perhaps you should try some spelling variations:
federazione anarchiche » federazioni anarchiche (Expand Search), federazione anarchica (Expand Search), federations anarchistes (Expand Search)
del base » del paese (Expand Search), di base (Expand Search), del mare (Expand Search)
del marx » del mare (Expand Search), di marx (Expand Search), del mir (Expand Search)
de della » e della (Expand Search), e delle (Expand Search), e nella (Expand Search)
communiste » comunista (Expand Search)

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: "principio ((del base) OR (del marx)) de della federazione anarchiche communiste~".
• Adding a wildcard symbol may retrieve word variants: principio ((del base) OR (del marx)) de della federazione anarchiche communiste*.