Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passieren, passiverer, passiven
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passieren
massiv » massive
massivere » massiveere, massiver, massive, massively

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