Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passiveren » massiveren, passiveneren, passivereren, passieren, passiven, passiver
passiverer » massiverer, passivenerer, passivererer, passiverwerb, passiver, passieren
passivieren » massivieren, passivenieren, passiverieren, passivierende, passivierung, passieren
massiverer » massivere, massierer, massiver

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 ((passiveren OR passiverer) OR passivieren)) OR massiverer)*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or passive) or ((passiveren OR passiverer) or passivieren)) or massiverer)*".