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

You may be able to get more results by adjusting your search query.

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