Perhaps you should try some spelling variations:
research while » research where, research which, research what
written paper » written after, writing paper
white papers » white paper, state papers
write paper » white paper, waste paper, writing paper
late paper » large paper, waste 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 ((write paper) OR (written paper)) ) OR ((( research ((white papers) OR (late paper)) ) OR ( research while pair )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( research ((write paper) OR (written paper)) ) or ((( research ((white papers) or (late paper)) ) or ( research while pair ))))".
• Adding a wildcard symbol may retrieve word variants: (( research ((write paper) OR (written paper)) ) or ((( research ((white papers) or (late paper)) ) or ( research while pair ))))*.