Perhaps you should try some spelling variations:
"research problemses" » "research problem", "research processes", "research progresses", "research projectes", "research programes"
"research problems" » "research process", "research project", "research program"
"research progress" » "research program", "research project", "research projects"

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