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)
"publicoosaa administration" » "publicaoosaa administration" (Expand Search), "publicooosaa administration" (Expand Search), "publicasoosaa administration" (Expand Search), "publicoosaa 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)

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 (((\"publicoosaa administration\") OR (\"publicoas administration\"))))~".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicoosaa administration ) OR ( publicoas administration ))))~.
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicoosaa administration") OR ("publicoas administration"))))*.