Perhaps you should try some spelling variations:
research progression » research regression, research progress, research progresses
research professor » research profession, research process, research prozess
research processes » research process, research procedures, 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 processes ) OR ( research progression )))).
• Adding a wildcard symbol may retrieve word variants: (( research professor ) or ((( research processes ) or ( research progression ))))*.