Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiverer » passiveerer, massiverer, passivererer, passiverwerb, passiver, passieren
passivereren » passiveereren, massivereren, passiverereren, passiverwerben, passiveren, passierenen, passivierenden, passieren, passiverwerb
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passieren
massiven » massive, massiv
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 (passiven OR massiven)) OR (massively OR (passiverer OR (passivereren OR passivieren))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or (passiven OR massiven)) or (massively or (passiverer or (passivereren or passivieren))))*".