Perhaps you should try some spelling variations:
"public administration" » "publico administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publica administration" » "publicoa administration" (Expand Search), "publicasa administration" (Expand Search), "publicosa administration" (Expand Search), "publica administracao" (Expand Search)
"publicasaosas administration" » "publicoasaosas administration" (Expand Search), "publicasasaosas administration" (Expand Search), "publicosasaosas administration" (Expand Search), "publicasaosas administracao" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("public administration") OR ((("publica administration") OR ("publicasaosas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publica administration\") OR (\"publicasaosas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publica administration ) OR ( publicasaosas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publica administration") OR ("publicasaosas administration"))))*.