Perhaps you should try some spelling variations:
research white » research while, research write, research what
research when » research where, research what, research why
white papers » white paper, state papers
when players » where players, chess players, whist players

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 papers ) OR ( research when players )).
• Adding a wildcard symbol may retrieve word variants: (( research white papers ) or ( research when players ))*.