Perhaps you should try some spelling variations:
geoinformation modelle » geoinformation models, information modelle, die informationsmodelle
informatik modelle » information modelle, bioinformatik modelle, informatic model
informatik modell » information modell, informatic model, informatic models

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: (( informatik modell ) OR ((( informatik modelle ) OR ((( geoinformatik modelle ) OR ( geoinformation modelle )))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( informatik modell ) or ((( informatik modelle ) or ((( geoinformatik modelle ) OR ( geoinformation modelle ))))))".
• Adding a wildcard symbol may retrieve word variants: (( informatik modell ) or ((( informatik modelle ) or ((( geoinformatik modelle ) OR ( geoinformation modelle ))))))*.