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