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

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

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