Perhaps you should try some spelling variations:
"research professional" » "researching professional", "resources professional", "health professional"
"research prozess" » "research process", "research progress", "research processes"
"research propels" » "research process", "research prospects", "research proposals"

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