Perhaps you should try some spelling variations:
heilkunde 5.1 » heilkunde 1, heilkunde 31, heilkunde 4.8
heilkunde 11 » heilkunde 1, heilkunde 10, heilkunde 16
verh.born.dt.gel.hno- » very.born.dt.gel.hno-, ver.born.dt.gel.hno-, vers.born.dt.gel.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.gel.hno-((((heilkunde 15.15) OR (heilkunde 5.1))) OR (heilkunde 11)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "verh.born.dt.gel.hno-((((heilkunde 15.15) OR (heilkunde 5.1))) or (heilkunde 11))".
• Adding a wildcard symbol may retrieve word variants: verh.born.dt.gel.hno-((((heilkunde 15.15) OR (heilkunde 5.1))) or (heilkunde 11))*.