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

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 papers) OR (late papers)) ) OR ( research while pair )))).
• Adding a wildcard symbol may retrieve word variants: (( research written paper ) or ((( research ((white papers) or (late papers)) ) or ( research while pair ))))*.