Perhaps you should try some spelling variations:
passiven » passive, passion
passagieren » passagiere
passieren » passiert
massige » massiger, massig
massiveeren » massivere, massigeren, massivdecken
passivieren » passivierung, passivierender, passionierten
passivierende » passivierungde, passivierenderde, passioniertende, passivierender, aktivierende, passivierung

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