You may be able to get more results by adjusting your search query.

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