Perhaps you should try some spelling variations:
"informative models" » "information models", "normative models", "informatique modeles"
"informatic modelse" » "informatic models", "informatic model", "information modelle"
"geoinformatik modelle" » "geoinformatik modell"

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: (("informative models") OR ((("informatic modelse") OR ("geoinformatik modelle")))).
• Removing quotes may allow a broader search: (( informative models ) or ((( informatic modelse ) or ( geoinformatik modelle )))).
• Adding a wildcard symbol may retrieve word variants: (("informative models") or ((("informatic modelse") or ("geoinformatik modelle"))))*.