Perhaps you should try some spelling variations:
ihre grenzgebiete » ihren grenzgebieten, die grenzgebiete, im grenzgebiet
der grenzgebiete » die grenzgebiete, dem grenzgebiet, und grenzgebiete
modern purveyors » modern purgatory, power purveyor
modern survey » modern surgery, models survey, model survey

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