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)
"publicoosas administration" » "publicooosas administration" (Expand Search), "publicasoosas administration" (Expand Search), "publicosoosas 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 ("publicoosas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publica administracao\") OR (\"publicoosas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publica administracao ) OR ( publicoosas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publica administracao") OR ("publicoosas administration"))))*.