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

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 progresses)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((research professor) OR (research profession))) or (research progresses))".
• Adding a wildcard symbol may retrieve word variants: ((((research professor) OR (research profession))) or (research progresses))*.