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