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