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

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