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