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