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

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

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