Perhaps you should try some spelling variations:
mathematical using » mathematics using, mathematical testing, mathematical beings
ihrer grenzgebiete » ihren grenzgebieten, der grenzgebiete, deren grenzgebiete
mathematica using » mathematics using, mathematica doing, mathematica und
ihre grenzgebiete » ihren grenzgebieten, die grenzgebiete, im grenzgebiet
modern survey » modern surgery, models survey, modeling survey
model survey » models survey, model surgery, moral survey

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 using) OR (mathematica using)) ((ihrer grenzgebiete) OR (ihre grenzgebiete)). 2. folge, a series of ((((modern survey) OR (model survey))s) OR (((modern survey) OR (model survey)))) in mathematics.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ergebnisse der ((mathematical using) OR (mathematica using)) ((ihrer grenzgebiete) or (ihre grenzgebiete)). 2. folge, a series of ((((modern survey) or (model survey))s) or (((modern survey) or (model survey)))) in mathematics".
• Adding a wildcard symbol may retrieve word variants: ergebnisse der ((mathematical using) OR (mathematica using)) ((ihrer grenzgebiete) or (ihre grenzgebiete)). 2. folge, a series of ((((modern survey) or (model survey))s) or (((modern survey) or (model survey)))) in mathematics*.