Perhaps you should try some spelling variations:
"research progression" » "research regression", "research progress", "research progresses"
"research professor" » "research profession", "research progresson", "research process"
"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 progression"))) OR ("research processes")).
• Removing quotes may allow a broader search: (((( research professor ) or ( research progression ))) or ( research processes )).
• Adding a wildcard symbol may retrieve word variants: (((("research professor") or ("research progression"))) or ("research processes"))*.