Perhaps you should try some spelling variations:
"research white paper" » "research write paper", "research what paper", "research where paper"
"research white papers" » "research write papers", "research what papers", "research where papers", "research state papers", "research late papers"
"research while papers" » "research where papers", "research which papers", "research what papers", "research while others", "research while part", "research while pair"
"research site paper" » "research sites paper", "research scope paper", "research say paper", "research size paper", "research state paper", "research fine 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 site paper") OR ("research white paper"))) OR ((("research white papers") OR ("research while papers")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"research site paper\") or (\"research white paper\"))) or (((\"research white papers\") OR (\"research while papers\"))))".
• Removing quotes may allow a broader search: (((( research site paper ) or ( research white paper ))) or ((( research white papers ) OR ( research while papers )))).
• Adding a wildcard symbol may retrieve word variants: (((("research site paper") or ("research white paper"))) or ((("research white papers") OR ("research while papers"))))*.