Perhaps you should try some spelling variations:
der mathematical » her mathematical, mer mathematical, order mathematical
modern survey » modern surgery, model survey, modeling survey
models survey » modeling survey, models supply
und ihrer » und ihr

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