Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passivierender » massivierender, passivenierender, passiverierender, passivierende, aktivierender, passivieren
massively » massive

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