Perhaps you should try some spelling variations:
aspekte management » aspects management, aspects management's, projekte management
object management » project management
aspect management » aspects management, affect management, aspects management's

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: %((((spectrum management) OR (object management))) OR (((aspect management) OR (aspekte management))))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((spectrum management) or (object management))) or (((aspect management) OR (aspekte management))))%22".
• Adding a wildcard symbol may retrieve word variants: %((((spectrum management) or (object management))) or (((aspect management) OR (aspekte management))))%22*.