Perhaps you should try some spelling variations:
"research professor" » "research profession", "research process", "research prozess"
"research prospects" » "research projects", "research project", "research aspects"
"research processes" » "research process", "research procedures", "research projects"
"research propels" » "research process", "research prozess", "research proposals"

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