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

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