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 rand search document" » "online brand search document", "online band search document", "online hand search document", "online random search document", "online ranked search document", "online range search document"
"online paid search document" » "online part search document", "online path search document", "online page search document", "online grid search document", "online based search document"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"online ((rand research) or (range research)) documents\") OR (((\"online rand search document\") OR (\"online paid search document\"))))".
• Removing quotes may allow a broader search: (( online ((rand research) or (range research)) documents ) OR ((( online rand search document ) OR ( online paid search document )))).
• Adding a wildcard symbol may retrieve word variants: (("online ((rand research) or (range research)) documents") OR ((("online rand search document") OR ("online paid search document"))))*.