Perhaps you should try some spelling variations:
"proletariado revolution" » "proletariado revolucion", "proletariado revoluciones"
"proletarias revolution" » "proletarias revolucion", "proletarias revoluciones", "proletaria revolution", "proletarios revolution", "proletariat revolution"
"proletariado evolucion" » "proletariado revolucion", "proletariado revoluciones"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("proletariado revolution") OR ("proletariado evolucion"))) OR ("proletarias revolution"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"proletariado revolution\") OR (\"proletariado evolucion\"))) OR (\"proletarias revolution\"))".
• Removing quotes may allow a broader search: (((( proletariado revolution ) OR ( proletariado evolucion ))) OR ( proletarias revolution )).
• Adding a wildcard symbol may retrieve word variants: (((("proletariado revolution") OR ("proletariado evolucion"))) OR ("proletarias revolution"))*.