Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivere » passiveere, massivere, passivenere, passiverer, passiver
passiveere » passiveeere, massiveere, passiveneere, passivieren, passiver, massivere
aktivierender » aktivierenden, aktivierende, aktivieren

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: ((passiv OR (passivere OR passiveere)) OR aktivierender).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or (passivere OR passiveere)) or aktivierender)".
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passivere OR passiveere)) or aktivierender)*.