Perhaps you should try some spelling variations:
v2.0 martin » 2.2 martin, 20 martin
2.3 martin » 2.3 main, 2.3 marketing
2 martin » 12 martin, 2 marine
2f 1889 » 23 1889, 22 1889, 24 1889
f 1889 » _ 1889, 1 1889
2 1889 » 23 1889, 2 1829, _ 1889

Try widening your search to All Fields.

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%((((v2.0 martin) OR (2.3 martin))) OR (2 martin)) %((((2f 1889) OR (f 1889))) OR (2 1889))-1976%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22heidegger%((((v2.0 martin) OR (2.3 martin))) or (2 martin)) %((((2f 1889) or (f 1889))) or (2 1889))-1976%22".
• Adding a wildcard symbol may retrieve word variants: %22heidegger%((((v2.0 martin) OR (2.3 martin))) or (2 martin)) %((((2f 1889) or (f 1889))) or (2 1889))-1976%22*.