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 biostatistical) OR ((biostatistics OR statistics) OR biostatistical)) AND epidemiology.\\\") OR (((\\\"practical guide to statistical AND epidemiology.\\\") OR (\\\"practice 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 biostatistical) OR ((biostatistics OR statistics) OR biostatistical)) and epidemiology.\\\\") OR (((\\\\"practical guide to statistical and epidemiology.\\\\") OR (\\\\"practice guide to statistical and epidemiology.\\\\"))))~\\\"\\"\"".
• Removing quotes may allow a broader search: \ ((\\ practical guidebook to (((biostatistics OR statistics) OR biostatistical) OR ((biostatistics OR statistics) OR biostatistical)) and epidemiology.\\ ) OR (((\\ practical guide to statistical and epidemiology.\\ ) OR (\\ practice guide to statistical and epidemiology.\\ ))))~\.