Perhaps you should try some spelling variations:
passiver » passive, passiven, passively
passiveren » passiveen, passivenen, passivelyen, passivieren, passieren, passiverer, passiverern, massiveren, passivierenn
passivere » passivee, passivene, passivelye, passiverer, massivere, passivieren
massiveren » massivere, massigeren, massivement, massiveeren
massiv » 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: (((passiver OR (passiveren OR massiveren)) OR massiv) OR passivere).
• Adding a wildcard symbol may retrieve word variants: (((passiver or (passiveren or massiveren)) or massiv) or passivere)*.