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) AND epidemiology.\\ ) OR (\\ practical guide to statistics AND epidemiology.\\ ))~.

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