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

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

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