Perhaps you should try some spelling variations:
ihre grenzgebiete » ihren grenzgebieten, die grenzgebiete, im grenzgebiet
other surgeons » younger surgeons
other surveys » other survey
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 mathematik und ihre grenzgebiete. 2. folge, a series of ((((other surveys) OR (other surgeons))) OR (der surveys)) 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 ((((other surveys) OR (other surgeons))) or (der surveys)) in mathematics*".