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

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

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