Perhaps you should try some spelling variations:
"online rand research documents" » "online rand search document", "online rand research arguments", "online rand research comments", "online brand research documents", "online range research documents", "online card research documents", "online band research documents", "online hand research documents"
"online rand search OR random search document" » "online ranked search OR random search document", "online range search OR random search document", "online trend search OR random search document"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("online rand research documents") OR ("online ((rand search) OR (random search)) document")).
• Removing quotes may allow a broader search: (( online rand research documents ) or ( online ((rand search) OR (random search)) document )).
• Adding a wildcard symbol may retrieve word variants: (("online rand research documents") or ("online ((rand search) OR (random search)) document"))*.