Perhaps you should try some spelling variations:
experimentiern » experimentieren, experimentiert, experimentiere, experimentiertn, experimentierenn, experimentingn
experimentier » experimentiert, experimentieren, experimenting
experimentierfeld » experimentiertfeld, experimentierenfeld, experimentingfeld, experimentieren

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: ( (experimentiern OR experimentier) OR experimentierfeld ).
• Adding a wildcard symbol may retrieve word variants: ( (experimentiern or experimentier) or experimentierfeld )*.