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