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) OR (practical guide)))) to (biostatistics OR biostatistical) AND epidemiology.\\ ) OR (\\ practice guide to statistics AND epidemiology.\\ ))*\~.

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