Perhaps you should try some spelling variations:
undergebnisse der » endergebnisse der, ergebnisse der, hauptergebnisse der
ihre grenzgebiete » ihren grenzgebieten, die grenzgebiete, im grenzgebiet
modern purveyors » power purveyor
modern purgatory » modern oratory, goddess purgatory
modern survey » modern surgery, models survey, model survey
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: %undergebnisse der (mathematik OR mathematical) und ihre grenzgebiete. 2. folge%2c a series of ((((modern purveyors) OR (modern purgatory))) OR (modern survey)) in mathematics%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%undergebnisse der (mathematik or mathematical) und ihre grenzgebiete. 2. folge%2c a series of ((((modern purveyors) OR (modern purgatory))) or (modern survey)) in mathematics%22".
• Adding a wildcard symbol may retrieve word variants: %undergebnisse der (mathematik or mathematical) und ihre grenzgebiete. 2. folge%2c a series of ((((modern purveyors) OR (modern purgatory))) or (modern survey)) in mathematics%22*.