Perhaps you should try some spelling variations:
mer mathematical » her mathematical, mpr mathematical, over mathematical
ergebnisse mer » ergebnisse mean, ergebnisse mit, ergebnisse 3
model surgery » modern surgery, bowel surgery, oral surgery
model survey » models survey, modern survey, moral survey
und ihrer » und ihre
und ihr » und ihre

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