Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publico administration" » "publicao administration" (Expand Search), "publicaso administration" (Expand Search), "publicoso administration" (Expand Search), "publico administracao" (Expand Search), "publica administration" (Expand Search)
"publicosa administration" » "publicaosa administration" (Expand Search), "publicasosa administration" (Expand Search), "publicososa administration" (Expand Search), "publicosa administracao" (Expand Search), "publicasa administration" (Expand Search), "publicos administration" (Expand Search), "publica administration" (Expand Search), "publicas 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 (((\"publico administration\") OR (\"publicosa administration\"))))~".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publico administration ) OR ( publicosa administration ))))~.
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publico administration") OR ("publicosa administration"))))*.