Perhaps you should try some spelling variations:
"research procedures" » "search procedures", "search procedure", "research processes"
"research professor" » "research profession", "research process", "research processes"
"research progress" » "research program", "research project", "research projects"
"research prozess" » "research process", "research propels", "research processes"

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 progress") OR ("research procedures")))).
• Removing quotes may allow a broader search: (((( research professor ) or ( research prozess ))) or ((( research progress ) or ( research procedures )))).
• Adding a wildcard symbol may retrieve word variants: (((("research professor") or ("research prozess"))) or ((("research progress") or ("research procedures"))))*.