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 statistical) OR (biostatistics OR statistical)) OR (biostatistics OR statistical)) 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 statistical) OR (biostatistics OR statistical)) OR (biostatistics OR statistical)) and epidemiology.\\\ ) OR (((\\\ practical guide to statistics and epidemiology.\\\ ) OR (\\\ practice guide to statistics and epidemiology.\\\ ))))~\\ \*".