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