Perhaps you should try some spelling variations:
mathematical using » mathematica using, mathematics using, mathematical testing
mathematical und » mathematica und, mathematical union, mathematical user
ihr grenzgebiete » ihre grenzgebiete, ihrer grenzgebiete, der grenzgebiete
modeling survey » modeling supply, models survey, modeling survival
modern surgery » open surgery, modern slavery
modern survey » models survey, model survey, modern supply

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