Perhaps you should try some spelling variations:
"public health" » "publicae health" (Expand Search), "republic health" (Expand Search)
"republicae health" » "republicaeae health" (Expand Search), "rerepublicae health" (Expand Search), "republica health" (Expand Search), "publicae health" (Expand Search), "republic health" (Expand Search)
"rerepublicaeae health" » "rerepublicaeaeae health" (Expand Search), "rererepublicaeae health" (Expand Search), "rerepublicaae health" (Expand Search), "republicaeae health" (Expand Search), "rerepublicae health" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("public health") OR ((("republicae health") OR ("rerepublicaeae health"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public health\") OR (((\"republicae health\") OR (\"rerepublicaeae health\"))))*".
• Removing quotes may allow a broader search: (( public health ) OR ((( republicae health ) OR ( rerepublicaeae health ))))*.