Perhaps you should try some spelling variations:
ihre grenzgebiete » ihren grenzgebieten, die grenzgebiete, im grenzgebiet
der mathematical » her mathematical, mer mathematical, order mathematical
mathematical und » mathematica und, mathematical union, mathematical using
modern surgery » open surgery, modern slavery
models survey » modeling survey, models supply
model surgery » bowel surgery, oral surgery, level surgery

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 und ihre grenzgebiete. 2. folge, a series of ((((models survey) OR (modern surgery))) OR (model surgery)) in mathematics.
• Adding a wildcard symbol may retrieve word variants: ergebnisse der mathematical und ihre grenzgebiete. 2. folge, a series of ((((models survey) or (modern surgery))) or (model surgery)) in mathematics*.