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