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 ((biostatistical OR (biostatistical OR biostatistical)) OR (biostatistical OR (biostatistical OR biostatistical))) AND epidemiology.\") OR (((\"practical guide to statistical AND epidemiology.\") OR (\"practice guide to statistical AND epidemiology.\"))))~".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"practical guidebook to ((biostatistical OR (biostatistical OR biostatistical)) OR (biostatistical OR (biostatistical OR biostatistical))) and epidemiology.\\") OR (((\\"practical guide to statistical and epidemiology.\\") OR (\\"practice guide to statistical and epidemiology.\\"))))~\"".
• Removing quotes may allow a broader search: (( practical guidebook to ((biostatistical OR (biostatistical OR biostatistical)) OR (biostatistical OR (biostatistical OR biostatistical))) and epidemiology. ) OR ((( practical guide to statistical and epidemiology. ) OR ( practice guide to statistical and epidemiology. ))))~.