Perhaps you should try some spelling variations:
"research professor" » "research profession", "research progresson", "research process"
"research processes" » "research process", "research procedures", "research projects"
"search procedures" » "search process"
"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 professor") OR ("research prozess"))) OR ((("research processes") OR ("search procedures")))).
• Removing quotes may allow a broader search: (((( research professor ) or ( research prozess ))) or ((( research processes ) or ( search procedures )))).
• Adding a wildcard symbol may retrieve word variants: (((("research professor") or ("research prozess"))) or ((("research processes") or ("search procedures"))))*.