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