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

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