Perhaps you should try some spelling variations:
"online rand research or range research documents" » "online rand research or change research documents", "online rand research or large research documents", "online rand research or range search documents", "online brand research or range research documents", "online card research or range research documents", "online ad research or range research documents"
"online ranked search document" » "online ranking search document", "online brand search document", "online ramsey search document", "online range search document", "online based search document", "online random search document"

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) or (range research)) documents") OR ("online ranked search document"))*.
• Removing quotes may allow a broader search: (( online ((rand research) or (range research)) documents ) or ( online ranked search document ))*.