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