Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passivene » massivene, passivenene, passiverene, passiven, passiveand, passiverer
aktivierender » aktivierenden, aktivierende, aktivieren
massiven » massive, passiven, massively
massivere » massiver, massive, massively

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 passive) OR (passivene OR aktivierender)) OR (massiven OR massivere)).
• Adding a wildcard symbol may retrieve word variants: (((passiv or passive) or (passivene or aktivierender)) or (massiven or massivere))*.