Perhaps you should try some spelling variations:
ihrer grenzgebiete » ihre grenzgebiete, ihren grenzgebieten, der grenzgebiete
der mathematical » her mathematical, mer mathematical, order mathematical
mathematical und » mathematica und, mathematical union, mathematical using
modern purveyors » modern survey, modern purgatory, power purveyor
2c a » 12c a, 20 a, 21 a

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: %ergebnisse der mathematical und ((ihrer grenzgebiete) OR (im grenzgebiet)). 2. folge%((((2c a) OR (2 a))) OR (c a)) series of modern purveyors in mathematics%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%ergebnisse der mathematical und ((ihrer grenzgebiete) or (im grenzgebiet)). 2. folge%((((2c a) OR (2 a))) or (c a)) series of modern purveyors in mathematics%22".
• Adding a wildcard symbol may retrieve word variants: %ergebnisse der mathematical und ((ihrer grenzgebiete) or (im grenzgebiet)). 2. folge%((((2c a) OR (2 a))) or (c a)) series of modern purveyors in mathematics%22*.