Perhaps you should try some spelling variations:
ihr grenzgebiete » ihre grenzgebiete, ihrer grenzgebiete, der grenzgebiete
model surveys » models survey, oder surveys, model survives
model survey » models survey, model surgery, modern survey
und ihr » und ihre
2c a » 12c a, 2 a, c a

Try widening your search to All Fields.

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 (mathematik OR mathematical) und ihr grenzgebiete. 2. folge%2c a series of ((model surveys) OR (model survey)) in mathematics%22.
• Adding a wildcard symbol may retrieve word variants: %ergebnisse der (mathematik or mathematical) und ihr grenzgebiete. 2. folge%2c a series of ((model surveys) or (model survey)) in mathematics%22*.