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