Perhaps you should try some spelling variations:
"information models" » "information model", "information modeling", "information modelling"
"informatik modell" » "information modell", "informatic models", "information modelle"
"informatic model" » "informatic models", "information model", "informative model"

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: (("information models") OR ((("informatik modell") OR ("informatic model")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"information models\") or (((\"informatik modell\") OR (\"informatic model\"))))".
• Removing quotes may allow a broader search: (( information models ) or ((( informatik modell ) OR ( informatic model )))).
• Adding a wildcard symbol may retrieve word variants: (("information models") or ((("informatik modell") OR ("informatic model"))))*.