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 (((biostatistical OR biostatistics) OR statistical) OR ((biostatistical OR biostatistics) OR statistical)) AND epidemiology.\\ ) OR ( practical guide to statistics AND epidemiology.\\ ))*\~".
• Adding a wildcard symbol may retrieve word variants: \ (( ((practice guidebook) OR (practical guidebook)) to (((biostatistical OR biostatistics) OR statistical) OR ((biostatistical OR biostatistics) OR statistical)) AND epidemiology.\\ ) OR ( practical guide to statistics AND epidemiology.\\ ))*\*.