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

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

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