Perhaps you should try some spelling variations:
ihre grenzgebiete » ihren grenzgebieten, die grenzgebiete, im grenzgebiet
22ergebnisse der » ergebnisse der, endergebnisse der, undergebnisse der
models survey » modeling survey
models supply » model supply, models support, des supply

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: %22ergebnisse der (mathematik OR mathematical) und ihre grenzgebiete. 2. folge%c a series of ((((models survey) OR (models supply))s) OR (((models survey) OR (models supply)))) in mathematics%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22ergebnisse der (mathematik or mathematical) und ihre grenzgebiete. 2. folge%c a series of ((((models survey) OR (models supply))s) or (((models survey) OR (models supply)))) in mathematics%22".
• Adding a wildcard symbol may retrieve word variants: %22ergebnisse der (mathematik or mathematical) und ihre grenzgebiete. 2. folge%c a series of ((((models survey) OR (models supply))s) or (((models survey) OR (models supply)))) in mathematics%22*.