Perhaps you should try some spelling variations:
"research profession" » "research professional", "research progression", "research professionals"
"research professor" » "research progresson", "search processor", "research professional"
"research processes" » "research procedures", "research projects", "research progress", "research progresses", "research projectses", "research problemses"
"research prozess" » "research progress", "research propels", "research proteases"
"research process" » "research progress", "research projects", "research problems"

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