Perhaps you should try some spelling variations:
"research state papers" » "research status papers", "research strategy papers", "research station papers", "research staff papers"
"research gate papers" » "research gated papers", "research game papers", "research kate papers", "research late papers", "research later papers", "research waste papers"

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 state papers") OR ("research gate papers")).
• Removing quotes may allow a broader search: (( research state papers ) or ( research gate papers )).
• Adding a wildcard symbol may retrieve word variants: (("research state papers") or ("research gate papers"))*.