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)
"publicooss administration" » "publicaooss administration" (Expand Search), "publicoooss administration" (Expand Search), "publicasooss administration" (Expand Search), "publicooss administracao" (Expand Search), "publicos administration" (Expand Search)
"publicaooa administration" » "publicaaooa administration" (Expand Search), "publicoaooa administration" (Expand Search), "publicasaooa administration" (Expand Search), "publicaooa 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 ("publicooss administration"))) OR ("publicaooa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicooss administration\"))) OR (\"publicaooa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicooss administration ))) OR ( publicaooa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicooss administration"))) OR ("publicaooa administration"))*.