Perhaps you should try some spelling variations:
heilkunde 15.15 » heilkunde 5.1
heilkunde 11 » heilkunde 1, heilkunde 10, heilkunde 16
verh.born.dt.ges.hno- » ver.born.dt.ges.hno-, vers.born.dt.ges.hno-, verb.born.dt.ges.hno-, verh.born.dt.gets.hno-, verh.born.dt.gels.hno-, verh.born.dt.gens.hno-
verh.born.dt.gems.hno- » ver.born.dt.gems.hno-, vers.born.dt.gems.hno-, verb.born.dt.gems.hno-, verh.born.dt.gets.hno-, verh.born.dt.gels.hno-, verh.born.dt.gem.hno-
very.born.dt.ges.hno- » very.born.dt.gets.hno-, very.born.dt.gels.hno-, very.born.dt.gens.hno-

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: (( (verh.born.dt.ges.hno- OR very.born.dt.ges.hno-)((heilkunde 15.15) OR (heilkunde 11)) ) OR ( verh.born.dt.gems.hno-((heilkunde 15.15) OR (heilkunde 11)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( (verh.born.dt.ges.hno- OR very.born.dt.ges.hno-)((heilkunde 15.15) or (heilkunde 11)) ) or ( verh.born.dt.gems.hno-((heilkunde 15.15) or (heilkunde 11)) ))".
• Adding a wildcard symbol may retrieve word variants: (( (verh.born.dt.ges.hno- OR very.born.dt.ges.hno-)((heilkunde 15.15) or (heilkunde 11)) ) or ( verh.born.dt.gems.hno-((heilkunde 15.15) or (heilkunde 11)) ))*.