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