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)
"publicosoos administration" » "publicaosoos administration" (Expand Search), "publicoosoos administration" (Expand Search), "publicasosoos administration" (Expand Search), "publicosoos administracao" (Expand Search)
"publicooa administration" » "publicaooa administration" (Expand Search), "publicoooa administration" (Expand Search), "publicasooa administration" (Expand Search), "publicooa administracao" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search), "publicos 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 ("publicosoos administration"))) OR ("publicooa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicosoos administration\"))) OR (\"publicooa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicosoos administration ))) OR ( publicooa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicosoos administration"))) OR ("publicooa administration"))*.