Perhaps you should try some spelling variations:
"research professional" » "researching professional", "resources professional", "health professional", "research progressional", "research professionalsal", "research progressionsal"
"research profession" » "research progression", "research professionals", "research progressions"
"health professions" » "health professionals", "healthcare professionals"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"research profession\") OR (((\"research professional\") OR (\"health professions\"))))*".
• Removing quotes may allow a broader search: (( research profession ) OR ((( research professional ) OR ( health professions ))))*.