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