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