Perhaps you should try some spelling variations:
"research white papers" » "research while papers", "research write papers", "research where papers", "research white paper"
"research state papers" » "research status papers", "research strategy papers", "research station papers", "research staff papers"
"research what papers" » "research what hampers", "research what players", "research what pages"

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