Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passagieren
passieren » passiert, passiven
massigeren » massiger, massigen, massivere
massivteilen » massivdecken, massigkeiten
massenteilen » massenmedialen, massenzahlen

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 ((passivieren OR passieren) OR (massigeren OR (massivteilen OR massenteilen)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((passivieren or passieren) or (massigeren or (massivteilen OR massenteilen))))".
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passivieren or passieren) or (massigeren or (massivteilen OR massenteilen))))*.