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