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)
"publicoas administration" » "publicaoas administration" (Expand Search), "publicooas administration" (Expand Search), "publicasoas administration" (Expand Search), "publicoas administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "publica administration" (Expand Search)
"publicoasoa administration" » "publicaoasoa administration" (Expand Search), "publicooasoa administration" (Expand Search), "publicasoasoa administration" (Expand Search), "publicoasoa administracao" (Expand Search), "publicasoa administration" (Expand Search), "publicosoa administration" (Expand Search), "publicaoa administration" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoas administration\"))) OR (\"publicoasoa administration\"))~".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoas administration ))) OR ( publicoasoa administration ))~.
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoas administration"))) OR ("publicoasoa administration"))*.