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

• The words AND, OR and NOT may confuse the search; try adding quotes: "\ (( ((practice guidebook) OR (practical guidebook)) to (((statistical OR biostatistics) OR (statistical OR biostatistics)) OR ((statistical OR biostatistics) OR (statistical OR biostatistics))) AND epidemiology.\\ ) OR ( ((practice guide) OR (practical guide)) to statistics AND epidemiology.\\ ))*\~".
• Adding a wildcard symbol may retrieve word variants: \ (( ((practice guidebook) OR (practical guidebook)) to (((statistical OR biostatistics) OR (statistical OR biostatistics)) OR ((statistical OR biostatistics) OR (statistical OR biostatistics))) AND epidemiology.\\ ) OR ( ((practice guide) OR (practical guide)) to statistics AND epidemiology.\\ ))*\*.