Perhaps you should try some spelling variations:
massiv » massive
massiveren » massiveeren, massivere, massigeren, massivement
massiveerer » massiveeerer, massivere, massierer
passiver » passiven, passively, passiert
passiverer » passivener, passivelyer, passierter, passiverwerb, passivieren, passieren

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: ((massiv OR (massiveren OR massiveerer)) OR ((passiver OR passiverer) OR passive)).
• Adding a wildcard symbol may retrieve word variants: ((massiv or (massiveren or massiveerer)) or ((passiver or passiverer) or passive))*.