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