Perhaps you should try some spelling variations:
"research white paper" » "research what paper", "research site paper", "research which paper"
"research white papers" » "research what papers", "research site papers", "research which papers", "research state papers"
"research write paper" » "research written paper", "research site paper", "research waste paper", "research writing paper"
"research where paper" » "research what paper", "research work paper", "research why paper", "research where proper", "research where apex", "research where peter"
"research while paper" » "research which paper", "research what paper", "research why paper", "research while pair", "research while chapter", "research edible paper"

Try widening your search to All Fields.

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