Perhaps you should try some spelling variations:
mathematical question » mathematical questions, mathematical function, mathematical education
ihren grenzgebieten » ihre grenzgebiete
der mathematical » her mathematical, mer mathematical, order mathematical
die grenzgebiete » ihre grenzgebiete, im grenzgebiet, und grenzgebiete
oder surveys » other surveys, cover surveys, user surveys
der surveys » user surveys, ir surveys, nir surveys

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 question ((ihren grenzgebieten) OR (die grenzgebiete)). 2. folge, a series of ((oder surveys) OR (der surveys)) in mathematics*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ergebnisse der mathematical question ((ihren grenzgebieten) or (die grenzgebiete)). 2. folge, a series of ((oder surveys) OR (der surveys)) in mathematics*".