Perhaps you should try some spelling variations:
"research professional" » "researching professional", "resources professional", "health professional"
"research progression" » "research regression", "research progress", "research progresses"
"research professor" » "research profession", "research process", "research processes"

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 professional") OR ("research progression")))).
• Removing quotes may allow a broader search: (( research professor ) or ((( research professional ) or ( research progression )))).
• Adding a wildcard symbol may retrieve word variants: (("research professor") or ((("research professional") or ("research progression"))))*.