You may be able to get more results by adjusting your search query.

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

Perhaps you should try some spelling variations:
"practical guidebook to biostatistics and epidemiology." » "practice guidebook to biostatistics and epidemiology." (Expand Search), "practical guidebook to statistics and epidemiology." (Expand Search)
"practical guide to statistical and epidemiology." » "practice guide to statistical and epidemiology." (Expand Search)