Perhaps you should try some spelling variations:
research documents » search document, research arguments, research comments
research effects » research efforts, research aspects, research projects
range research » change research, large research, range search
hate research » rate research, state research, taste research
online range » online change, online ring, nonlinear range
online hate » online chat, online health, online handel

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 hate research documents ) OR ( online range research effects )).
• Adding a wildcard symbol may retrieve word variants: (( online hate research documents ) or ( online range research effects ))*.