Perhaps you should try some spelling variations:
"research profession" » "research professional", "research progression", "research professionals"
"research problems" » "research progress", "research process", "research program"
"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 profession") OR ("research prozess"))) OR ((("research problems") OR ("research project")))).
• Removing quotes may allow a broader search: (((( research profession ) or ( research prozess ))) or ((( research problems ) or ( research project )))).
• Adding a wildcard symbol may retrieve word variants: (((("research profession") or ("research prozess"))) or ((("research problems") or ("research project"))))*.