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

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

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