Perhaps you should try some spelling variations:
"informationsmangel" » "informationsmanager", "informationsmittel", "informationsempfanger"
"innovationsmanager" » "innovationsmanagement"
"innovationsmanagements" » "innovationsmanagement", "informationsmanagement"

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