Perhaps you should try some spelling variations:
"research edible paper" » "research flexible paper", "research enables paper", "research enabled paper", "research readable paper", "research edible matter"
"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 paper" » "research where paper", "research which paper", "research what paper", "research while pair", "research while chapter"

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