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

• Removing quotes may allow a broader search: \ \\ ((\\\ ((practical guidebook) OR (practical guide)) to biostatistics AND epidemiology.\\\ ) OR (\\\ practice guide to statistics AND epidemiology.\\\ ))~\\.

Perhaps you should try some spelling variations:
"\ \\ \\\ practical guidebook OR practical guide to biostatistics AND epidemiology.\\\ OR \\\ practice guide to statistics AND epidemiology.\\\ \" » "\ \\ \\\ practical guidebook OR practical guide to biostatistical AND epidemiology.\\\ OR \\\ practice guide to statistical AND epidemiology.\\\ \" (Expand Search)