Perhaps you should try some spelling variations:
research professor » research profession, research prozess, search processor
research processes » research procedures, research projects, research progress
research problems » research progress, research project, research program
research process » research progress, research projects, research project

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 process ) OR ( research problems ))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( research professor ) OR ( research processes ))) or ((( research process ) or ( research problems ))))*".