Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicoos administration" » "publicaoos administration" (Expand Search), "publicooos administration" (Expand Search), "publicasoos administration" (Expand Search), "publicos administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicoao administracao" » "publicaoao administracao" (Expand Search), "publicooao administracao" (Expand Search), "publicasoao administracao" (Expand Search), "publica administracao" (Expand Search), "publico administracao" (Expand Search), "publicas administracao" (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 ("publicoos administration"))) OR ("publicoao administracao"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoos administration\"))) OR (\"publicoao administracao\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoos administration ))) OR ( publicoao administracao )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoos administration"))) OR ("publicoao administracao"))*.