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