Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passiverierung » massiverierung, passivenerierung, passivererierung, passivierung, passivierungs
passiverer » massiverer, passivenerer, passivererer, passiverwerb, passivieren, passiver, passiverr, passivierenr
passive » massive, passivene, passivere
passivere » massivere, passivenere, passiverere, passiver, passivieren

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 (passiverierung OR passiverer)) OR (passive OR passivere)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or (passiverierung or passiverer)) or (passive OR passivere))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passiverierung or passiverer)) or (passive OR passivere))*.