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 (\\ practical guide to statistical AND epidemiology.\\\ ))*\\.

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