Perhaps you should try some spelling variations:
"research progression" » "research regression", "research progresses", "research professional", "research programion", "research projection", "research projectsion"
"research professor" » "research profession", "research process", "research processes"
"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 progression") OR ("research progress")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"research professor\") or (((\"research progression\") OR (\"research progress\"))))".
• Removing quotes may allow a broader search: (( research professor ) or ((( research progression ) OR ( research progress )))).
• Adding a wildcard symbol may retrieve word variants: (("research professor") or ((("research progression") OR ("research progress"))))*.