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