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

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