Perhaps you should try some spelling variations:
"research written paper" » "research within paper", "research writing paper", "research twitter paper"
"research written after" » "research within after", "research writing after", "research twitter after"
"research write paper" » "research site paper", "research waste paper", "research while paper", "research white paper", "research writing paper"
"research white papers" » "research while papers", "research what papers", "research where papers", "research white paper", "research state 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 write paper") OR ("research white papers"))) OR ((("research written paper") OR ("research written after")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"research write paper\") or (\"research white papers\"))) or (((\"research written paper\") OR (\"research written after\"))))".
• Removing quotes may allow a broader search: (((( research write paper ) or ( research white papers ))) or ((( research written paper ) OR ( research written after )))).
• Adding a wildcard symbol may retrieve word variants: (((("research write paper") or ("research white papers"))) or ((("research written paper") OR ("research written after"))))*.