Perhaps you should try some spelling variations:
"online car research documents" » "online car research arguments", "online car research comments", "online car research catchments", "online care research documents", "online card research documents", "online cars research documents", "online chat research documents", "online case research documents", "online ch 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 rand research 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 car research documents") OR ("online rand search document")).
• Removing quotes may allow a broader search: (( online car research documents ) or ( online rand search document )).
• Adding a wildcard symbol may retrieve word variants: (("online car research documents") or ("online rand search document"))*.