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