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 (((biostatistical OR biostatistical) OR (biostatistical OR biostatistical)) OR (biostatistical OR biostatistical)) AND epidemiology.\\ ) OR ((\\ practical OR \\ practice) guide to (statistics OR statistical) AND epidemiology.\\ ))~\.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\ (((\\ practical OR \\ practice) guidebook to (((biostatistical OR biostatistical) OR (biostatistical OR biostatistical)) OR (biostatistical OR biostatistical)) AND epidemiology.\\ ) OR ((\\ practical OR \\ practice) guide to (statistics OR statistical) and epidemiology.\\ ))~\".
• Adding a wildcard symbol may retrieve word variants: \ (((\\ practical OR \\ practice) guidebook to (((biostatistical OR biostatistical) OR (biostatistical OR biostatistical)) OR (biostatistical OR biostatistical)) AND epidemiology.\\ ) OR ((\\ practical OR \\ practice) guide to (statistics OR statistical) and epidemiology.\\ ))~\*.