Perhaps you should try some spelling variations:
informationsmangel » informationsempfanger, informationsangebot, informationsmodell
informationsmanager » innovationsmanager, informationstrager, informationsmanagement
informationsmittel » informationsmodell, informationsmaterial

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: ( (informationsmangel OR informationsmanager) OR informationsmittel ).
• The words AND, OR and NOT may confuse the search; try adding quotes: "( (informationsmangel OR informationsmanager) or informationsmittel )".
• Adding a wildcard symbol may retrieve word variants: ( (informationsmangel OR informationsmanager) or informationsmittel )*.