Perhaps you should try some spelling variations:
ihrer grenzgebiete » ihre grenzgebiete, ihren grenzgebieten, der grenzgebiete
modern survey » modern surgery, models survey, modeling survey
model survey » models survey, model surgery, moral survey
und ihrer » und ihre, und ihr
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 OR mathematical) und ihrer grenzgebiete. 2. folge%2c a series of ((((model survey) OR (modern survey))s) OR (((model survey) OR (modern survey)))) in mathematics%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%ergebnisse der (mathematik or mathematical) und ihrer grenzgebiete. 2. folge%2c a series of ((((model survey) OR (modern survey))s) or (((model survey) OR (modern survey)))) in mathematics%22".
• Adding a wildcard symbol may retrieve word variants: %ergebnisse der (mathematik or mathematical) und ihrer grenzgebiete. 2. folge%2c a series of ((((model survey) OR (modern survey))s) or (((model survey) OR (modern survey)))) in mathematics%22*.