Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveieren » passiveeieren, massiveieren, passiveneieren, passionierten, passivierende, passivierung
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passagieren
passieren » passiert, passiven
massiveeren » massivere, massigeren, massivdecken

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