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: "\"\\"((\\\"practical guidebook to biostatistical AND epidemiology.\\\") OR (\\\"practice guide to statistics AND epidemiology.\\\"))\\"\"".
• Removing quotes may allow a broader search: ((\ practical guidebook to biostatistical AND epidemiology.\ ) OR (\ practice guide to statistics AND epidemiology.\ )).