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)
"publicaos administration" » "publicaaos administration" (Expand Search), "publicoaos administration" (Expand Search), "publicasaos administration" (Expand Search), "publicaos administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "publica administration" (Expand Search)
"publicoao administration" » "publicaoao administration" (Expand Search), "publicooao administration" (Expand Search), "publicasoao administration" (Expand Search), "publicoao administracao" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas 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 ("publicaos administration"))) OR ("publicoao administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaos administration\"))) OR (\"publicoao administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaos administration ))) OR ( publicoao administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaos administration"))) OR ("publicoao administration"))*.