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)
"publicasa administration" » "publicaasa administration" (Expand Search), "publicoasa administration" (Expand Search), "publicasasa administration" (Expand Search), "publicasa administracao" (Expand Search), "publicas administration" (Expand Search), "publica administration" (Expand Search), "publicos administration" (Expand Search)
"publicooasa administration" » "publicaooasa administration" (Expand Search), "publicoooasa administration" (Expand Search), "publicasooasa administration" (Expand Search), "publicooasa administracao" (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 (((\"publicasa administration\") OR (\"publicooasa administration\"))))~".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicasa administration ) OR ( publicooasa administration ))))~.
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicasa administration") OR ("publicooasa administration"))))*.