Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiveieren » passiveeieren, massiveieren, passivereieren, passivieren, passionierten, passivierende
passiven » passiveen, massiven, passiveren, passive
massiver » massive, massiven, 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: (passiv OR ((passiveieren OR (passiveieren OR (passiven OR passion))) OR massiver)).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passiveieren or (passiveieren or (passiven or passion))) or massiver))*.