Perhaps you should try some spelling variations:
"research progressionsal" » "research professional", "research progression", "research professionals", "research progressional", "research progressesal", "research regressional"
"research progressions" » "research progression", "research progresses", "research regression"
"research profession" » "research professional", "research progression", "research professionals"

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