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 guidebook to ((biostatistics OR biostatistics) OR biostatistics) AND epidemiology.\\\ ) OR (((\\\ practical guide to statistics AND epidemiology.\\\ ) OR (\\\ practice guide to statistics AND epidemiology.\\\ ))))~\\.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\ \\ ((\\\ practical guidebook to ((biostatistics OR biostatistics) OR biostatistics) and epidemiology.\\\ ) OR (((\\\ practical guide to statistics and epidemiology.\\\ ) OR (\\\ practice guide to statistics and epidemiology.\\\ ))))~\\".
• Adding a wildcard symbol may retrieve word variants: \ \\ ((\\\ practical guidebook to ((biostatistics OR biostatistics) OR biostatistics) and epidemiology.\\\ ) OR (((\\\ practical guide to statistics and epidemiology.\\\ ) OR (\\\ practice guide to statistics and epidemiology.\\\ ))))~\\*.