Perhaps you should try some spelling variations:
research written » research write, research within, research writing
research where » research what, research work, research why
written paper » written after, writing paper
where papers » where players, white papers, theme papers

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 where papers )).
• Adding a wildcard symbol may retrieve word variants: (( research written paper ) or ( research where papers ))*.