Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivierende » passiveierende, massivierende, passivenierende, passivierender, passivieren, aktivierende
massivieren » passivieren, massivere, passivierung
massigeren » massiger, massigen, massivere
massively » massive

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 ((massivieren OR passivierende) OR (massigeren OR massively)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((massivieren OR passivierende) or (massigeren or massively)))*".