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)
"rerepublicae health" » "rerepublicaeae health" (Expand Search), "rererepublicae health" (Expand Search), "rerepublica health" (Expand Search), "republicae health" (Expand Search), "rerepublic health" (Expand Search), "republica 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 ("rerepublicae health"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public health\") OR (((\"republicae health\") OR (\"rerepublicae health\"))))*".
• Removing quotes may allow a broader search: (( public health ) OR ((( republicae health ) OR ( rerepublicae health ))))*.