Perhaps you should try some spelling variations:
massiv » massive
massiveren » massiveeren, massivere, massigeren, massivement
massierer » kassierer, kassierers, massferrer
passivere » passiver, massivere, passivieren
passiverer » passiverr, massiverer, passivierenr, passiverwerb, passivieren, passiver

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