Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passivenere » massivenere, passivenenere, passiverenere, passiverer, passiverwerb
massiveren » massivere, massigeren, massivement

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 (passive OR passivenere)) OR (massive OR massiveren)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passive or passivenere)) or (massive or massiveren))*.