Perhaps you should try some spelling variations:
ihrer grenzgebiete » ihre grenzgebiete, ihren grenzgebieten, der grenzgebiete
mathematical und » mathematical union, mathematical using, mathematical user
modern purveyors » modern survey, modern purgatory, power purveyor
mathematica und » mathematica _, mathematica a, mathematica 2
2c a » 12c a, 2 a, 20 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) OR (mathematica und)) ((ihrer grenzgebiete) OR (im grenzgebiet)). 2. folge%((2c 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) OR (mathematica und)) ((ihrer grenzgebiete) or (im grenzgebiet)). 2. folge%((2c a) or (c a)) series of modern purveyors in mathematics%22".
• Adding a wildcard symbol may retrieve word variants: %ergebnisse der ((mathematical und) OR (mathematica und)) ((ihrer grenzgebiete) or (im grenzgebiet)). 2. folge%((2c a) or (c a)) series of modern purveyors in mathematics%22*.