Perhaps you should try some spelling variations:
research documents » search document, research arguments, research comments
research studies » research study
peace research » space research, device research, practice research
rand research » brand research, range research, card research
online peace » online place, online page, online phase
online rand » online brand, online band, online hand

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 peace research documents ) OR ( online rand research studies )).
• Adding a wildcard symbol may retrieve word variants: (( online peace research documents ) or ( online rand research studies ))*.