Perhaps you should try some spelling variations:
"research progression" » "research regression", "research progress", "research progresses"
"research professor" » "research profession", "research processes", "research prozess"
"research process" » "research progress", "research projects", "research problems"

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