Perhaps you should try some spelling variations:
"online based research documents" » "online based research comments", "online based research catchments", "online based research students", "online basic research documents", "line based research documents", "spline based research documents", "online band research documents"
"online case research documents" » "online case research comments", "online case research catchments", "online case research students", "online care research documents", "online use research documents", "online change research documents", "online class research documents", "online classes research documents"
"online case research arguments" » "online case research catchments", "online case research students", "online case research elements", "online care research arguments", "online use research arguments", "online change research arguments", "online class research arguments", "online classes research arguments"
"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 based research documents") OR ((("online case research documents") OR ("online case research arguments"))))) OR ("online rand search document")).
• Removing quotes may allow a broader search: (((( online based research documents ) or ((( online case research documents ) or ( online case research arguments ))))) or ( online rand search document )).
• Adding a wildcard symbol may retrieve word variants: (((("online based research documents") or ((("online case research documents") or ("online case research arguments"))))) or ("online rand search document"))*.