You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: \ \\ (((\\\ practical OR \\\ practice) guidebook to (((biostatistics OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) AND epidemiology.\\\ ) OR ((\\\ practical OR \\\ practice) guide to statistics AND epidemiology.\\\ ))~\\ \.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\ \\ (((\\\ practical OR \\\ practice) guidebook to (((biostatistics OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) 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 OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) AND epidemiology.\\\ ) OR ((\\\ practical OR \\\ practice) guide to statistics and epidemiology.\\\ ))~\\ \*.