Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveen » passiveeen, massiveen, passiveneen, passiven, passiveand, passive
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passiveeeer » passiveeeeer, massiveeeer, passiveneeeer, passiverwerb
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passiver, passieren
massiveen » massiven, massivement, massivsten

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