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

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