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