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)
"publicooso administration" » "publicaooso administration" (Expand Search), "publicoooso administration" (Expand Search), "publicasooso administration" (Expand Search), "publicooso administracao" (Expand Search), "publicos administration" (Expand Search)
"publicoosoa administration" » "publicaoosoa administration" (Expand Search), "publicooosoa administration" (Expand Search), "publicasoosoa administration" (Expand Search), "publicoosoa administracao" (Expand Search), "publicosa 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 ("publicooso administration"))) OR ("publicoosoa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicooso administration\"))) OR (\"publicoosoa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicooso administration ))) OR ( publicoosoa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicooso administration"))) OR ("publicoosoa administration"))*.