Perhaps you should try some spelling variations:
12 mapping » 2 mapping, 7 mapping
20 martin » 10 martin, v2.0 martin, 20 marine
12 mating » 12 making, 12 meeting, 12 marine
1823 1889 » 1820 1889, 1811 1889, 1888 1889
12 marie » 12 marine, 12 market, 12 martin
2 martin » 12 martin, 2 marine
2f 1889 » 23 1889, 2 1889, f 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 (((((((12 mating) OR (12 mapping))) OR (12 marie))) OR (2 martin)))) %((2f 1889) OR (1823 1889))-1976%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22heidegger%((20 martin) or (((((((12 mating) OR (12 mapping))) or (12 marie))) or (2 martin)))) %((2f 1889) or (1823 1889))-1976%22".
• Adding a wildcard symbol may retrieve word variants: %22heidegger%((20 martin) or (((((((12 mating) OR (12 mapping))) or (12 marie))) or (2 martin)))) %((2f 1889) or (1823 1889))-1976%22*.