Perhaps you should try some spelling variations:
resistive » assistive
resistiver » assistiver, resister
resisting » existing, resistant, assisting
resistir » resistor, resister, resistors
restriktiver » restriktive, restriktiven, restrictive

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: ((resistive OR resisting) OR (resistir OR (resistiver OR restriktiver))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((resistive or resisting) or (resistir or (resistiver OR restriktiver)))".
• Adding a wildcard symbol may retrieve word variants: ((resistive or resisting) or (resistir or (resistiver OR restriktiver)))*.