Perhaps you should try some spelling variations:
20 martin » 10 martin, v2.0 martin, 20 marine
1823 1889 » 1820 1889
1888 1889 » 1888 1985, 1820 1889
1811 1889 » 1811 1884, 1811 1882, 1811 1885
2 martin » 12 martin, 2 marine
2f 1889 » 2 1889, f 1889, 22 1889

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)) %((2f 1889) OR (((23 1889) OR (((((1823 1889) OR (1888 1889))) OR (1811 1889))))))-1976%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22heidegger%((20 martin) or (2 martin)) %((2f 1889) or (((23 1889) or (((((1823 1889) OR (1888 1889))) or (1811 1889))))))-1976%22".
• Adding a wildcard symbol may retrieve word variants: %22heidegger%((20 martin) or (2 martin)) %((2f 1889) or (((23 1889) or (((((1823 1889) OR (1888 1889))) or (1811 1889))))))-1976%22*.