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