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)
"publicosaa administration" » "publicaosaa administration" (Expand Search), "publicoosaa administration" (Expand Search), "publicasosaa administration" (Expand Search), "publicosaa administracao" (Expand Search), "publicos administration" (Expand Search)
"publicooosas administration" » "publicaooosas administration" (Expand Search), "publicoooosas administration" (Expand Search), "publicasooosas administration" (Expand Search), "publicooosas 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 ((("publicosaa administration") OR ("publicooosas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicosaa administration\") OR (\"publicooosas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicosaa administration ) OR ( publicooosas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicosaa administration") OR ("publicooosas administration"))))*.