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