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"
"research prozess" » "research process", "research progress", "research propels"

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