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 ((biostatistics OR biostatistical) 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 biostatistics OR biostatistical OR biostatistical AND epidemiology.\\ OR practical OR practice guide to statistics AND epidemiology.\\ *\" » "\ practical OR practice guidebook to biostatistics OR statistical 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 AND epidemiology.\\ OR practical OR practice guide to statistical AND epidemiology.\\ *\" (Expand Search)