Perhaps you should try some spelling variations:
20 martin » 10 martin, v2.0 martin, 20 marine
2 martin » 12 martin, 2 marine
23 1889 » 1823 1889
2 1889 » 2 1829, 2 1819, 2 1809
_ 1889 » _ 1880, _ 1819, _ 1849

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: %22heidegger%((20 martin) OR (2 martin)) %((((2 1889) OR (_ 1889))) OR (23 1889))-1976%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22heidegger%((20 martin) or (2 martin)) %((((2 1889) OR (_ 1889))) or (23 1889))-1976%22".
• Adding a wildcard symbol may retrieve word variants: %22heidegger%((20 martin) or (2 martin)) %((((2 1889) OR (_ 1889))) or (23 1889))-1976%22*.