Perhaps you should try some spelling variations:
"public administration" » "publico administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search)
"publica administracao" » "publicoa administracao" (Expand Search), "publicasa administracao" (Expand Search), "publicosa administracao" (Expand Search)
"publicoa administration" » "publicooa administration" (Expand Search), "publicasoa administration" (Expand Search), "publicosoa administration" (Expand Search), "publico administration" (Expand Search), "publicos administration" (Expand Search), "publicas administration" (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 administracao") OR ("publicoa administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publica administracao\") OR (\"publicoa administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publica administracao ) OR ( publicoa administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publica administracao") OR ("publicoa administration"))))*.