Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search), "public administracao" (Expand Search)
"publicaaaoas administration" » "publicaaaaoas administration" (Expand Search), "publicoaaaoas administration" (Expand Search), "publicasaaaoas administration" (Expand Search), "publicaaaoas administracao" (Expand Search)
"publicoosa administration" » "publicaoosa administration" (Expand Search), "publicooosa administration" (Expand Search), "publicasoosa administration" (Expand Search), "publicoosa administracao" (Expand Search), "publicos administration" (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 administration") OR ("publicaaaoas administration"))) OR ("publicoosa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaaaoas administration\"))) OR (\"publicoosa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaaaoas administration ))) OR ( publicoosa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaaaoas administration"))) OR ("publicoosa administration"))*.