Perhaps you should try some spelling variations:
"research written paper" » "research write paper", "research within paper", "research writing paper", "research written after"
"research white paper" » "research write paper", "research what paper", "research site paper"
"research while papers" » "research where papers", "research which papers", "research what papers", "research white papers", "research while others", "research while pair"
"research while part" » "research where part", "research which part", "research what part", "research chile part"

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