Perhaps you should try some spelling variations:
"research state paper" » "research status paper", "research strategy paper", "research station paper", "research state papers", "research late paper", "research same paper"
"research write papers" » "research written papers", "research waste papers", "research while papers", "research white paper", "research private papers"
"research white papers" » "research while papers", "research what papers", "research where papers", "research white paper", "research state papers"
"research site paper" » "research sites paper", "research scope paper", "research say paper", "research size paper", "research white paper", "research fine paper"

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 site paper") OR ("research state paper"))) OR ((("research write papers") OR ("research white papers")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"research site paper\") OR (\"research state paper\"))) or (((\"research write papers\") or (\"research white papers\"))))".
• Removing quotes may allow a broader search: (((( research site paper ) OR ( research state paper ))) or ((( research write papers ) or ( research white papers )))).
• Adding a wildcard symbol may retrieve word variants: (((("research site paper") OR ("research state paper"))) or ((("research write papers") or ("research white papers"))))*.