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