Perhaps you should try some spelling variations:
"research white papers" » "research while papers", "research write papers", "research what papers", "research white paper", "research state papers"
"research which papers" » "research ethics papers", "research what papers", "research why papers", "research which players", "research which popery", "research which popes"
"research late papers" » "research later papers", "research gate papers", "research kate papers", "research late 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 white papers") OR ("research late papers"))) OR ("research which papers")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"research white papers\") OR (\"research late papers\"))) or (\"research which papers\"))".
• Removing quotes may allow a broader search: (((( research white papers ) OR ( research late papers ))) or ( research which papers )).
• Adding a wildcard symbol may retrieve word variants: (((("research white papers") OR ("research late papers"))) or ("research which papers"))*.