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