Perhaps you should try some spelling variations:
professional perspectives » regional perspectives, personal perspectives, professional practice
professional experience » personal experience, professional competence
professional practices » professional practice, professional services

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: ((((((professional expertise) OR (professional perspectives))) OR (professional experience))) OR (professional practices)) distilled.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((professional expertise) OR (professional perspectives))) or (professional experience))) or (professional practices)) distilled".
• Adding a wildcard symbol may retrieve word variants: ((((((professional expertise) OR (professional perspectives))) or (professional experience))) or (professional practices)) distilled*.