Perhaps you should try some spelling variations:
federazioni anarchiche » federazione anarchica (Expand Search), federations anarchistes (Expand Search)
federazione anarchico » federazione anarchica (Expand Search), internazionale anarchico (Expand Search)
principes de » principio del (Expand Search)
de base » di base (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: "principes de base de la ((federazione anarchico) OR (federazioni anarchiche)) communiste~".
• Adding a wildcard symbol may retrieve word variants: principes de base de la ((federazione anarchico) OR (federazioni anarchiche)) communiste*.