Perhaps you should try some spelling variations:
heilkunde 1991 » heilkunde 11, heilkunde 15.15, heilkunde 1
heilkunde 10 » heilkunde 1, heilkunde 11, heilkunde 16
very.been.dt.good.hno-heilkunde » every.been.dt.good.hno-heilkunde, viery.been.dt.good.hno-heilkunde
ver.been.dt.good.hno-heilkunde » ever.been.dt.good.hno-heilkunde, vier.been.dt.good.hno-heilkunde

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: (( very.been.dt.good.hno-heilkunde 1991 ) OR ( ver.been.dt.good.hno-heilkunde 10 )).
• Adding a wildcard symbol may retrieve word variants: (( very.been.dt.good.hno-heilkunde 1991 ) or ( ver.been.dt.good.hno-heilkunde 10 ))*.