Perhaps you should try some spelling variations:
"research written papers" » "research write papers", "research within papers", "research writing papers", "research written paper", "research written patterns"
"research white paper" » "research while paper", "research write paper", "research what paper"
"research late papers" » "research later papers", "research gate papers", "research kate papers", "research late paper", "research state papers", "research white 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 white paper") OR ("research written papers"))) OR ("research late papers")).
• Removing quotes may allow a broader search: (((( research white paper ) or ( research written papers ))) or ( research late papers )).
• Adding a wildcard symbol may retrieve word variants: (((("research white paper") or ("research written papers"))) or ("research late papers"))*.