Perhaps you should try some spelling variations:
research profession » research professional, research progression, research professionals
research professor » research process, research processes, research prozess
research progress » research program, research project, research projects

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 professor ) OR ((( research profession ) OR ( research progress )))).
• Adding a wildcard symbol may retrieve word variants: (( research professor ) or ((( research profession ) or ( research progress ))))*.