Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveieren » passiveeieren, passiveneieren, passivereieren, passivieren, passionierten, passivierende
massiv » massive
massivement » massiveement
massiveeren » massiveeeren, massivere, passivieren, massigeren
passieren » passiert, passiven

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