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)
"publicaasa administration" » "publicaaasa administration" (Expand Search), "publicoaasa administration" (Expand Search), "publicasaasa administration" (Expand Search), "publicaasa administracao" (Expand Search), "publicas administration" (Expand Search)
"publicoa administration" » "publicaoa administration" (Expand Search), "publicooa administration" (Expand Search), "publicasoa administration" (Expand Search), "publicoa 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.

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