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 statistics) AND epidemiology.\\\ ) OR (\\ practical guide to statistical AND epidemiology.\\\ ))~\\ \*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\ \\ ((\\ practical guidebook to (biostatistics OR statistics) and epidemiology.\\\ ) OR (\\ practical guide to statistical and epidemiology.\\\ ))~\\ \*".