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

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

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