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

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