Perhaps you should try some spelling variations:
mathematical testing » mathematical setting, mathematics testing, mathematical teaching
ihren grenzgebieten » ihre grenzgebiete
mathematical using » mathematica using, mathematics using, mathematical beings
modern purveyors » modern purgatory, power purveyor
modern surveys » oder surveys, modern surgery, models survey
modern survey » modern surgery, models survey, model survey

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 using) OR (mathematical testing)) ihren grenzgebieten. 2. folge, a series of ((((modern surveys) OR (modern purveyors))) OR (modern survey)) in mathematics.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ergebnisse der ((mathematical using) OR (mathematical testing)) ihren grenzgebieten. 2. folge, a series of ((((modern surveys) or (modern purveyors))) or (modern survey)) in mathematics".
• Adding a wildcard symbol may retrieve word variants: ergebnisse der ((mathematical using) OR (mathematical testing)) ihren grenzgebieten. 2. folge, a series of ((((modern surveys) or (modern purveyors))) or (modern survey)) in mathematics*.