Perhaps you should try some spelling variations:
"research professor" » "research profession", "research processes", "research prozess"
"research progress" » "research projects"
"research process" » "research projects", "research problems", "research papers"

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 process") OR ("research progress"))) OR ((("research program") OR ("research project"))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"research professor\") or (((((\"research process\") or (\"research progress\"))) or (((\"research program\") OR (\"research project\"))))))*".
• Removing quotes may allow a broader search: (( research professor ) or ((((( research process ) or ( research progress ))) or ((( research program ) OR ( research project ))))))*.