Perhaps you should try some spelling variations:
research professional » researching professional, resources professional, health professional
research processes » research process, research procedures, research projects
research prozess » research process, research progress, research propels

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: (((( research professional ) OR ( research prozess ))) OR ( research processes )).
• Adding a wildcard symbol may retrieve word variants: (((( research professional ) or ( research prozess ))) or ( research processes ))*.