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

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

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