Perhaps you should try some spelling variations:
research document » research documents, search document, research comment
research comments » research commons, research contents, research commentary
rand research » brand research, range research, ad research
card research » care research, based research
online rand » online brand, online band, online hand
online card » online car, online care, online case

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: (( online rand research document ) OR ( online card research comments )).
• Adding a wildcard symbol may retrieve word variants: (( online rand research document ) or ( online card research comments ))*.