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

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