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

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