Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicoaaa administracao" » "publicaoaaa administracao" (Expand Search), "publicooaaa administracao" (Expand Search), "publicasoaaa administracao" (Expand Search)
"publicoas administration" » "publicaoas administration" (Expand Search), "publicooas administration" (Expand Search), "publicasoas administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "publica 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 ((("publicoaaa administracao") OR ("publicoas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicoaaa administracao\") OR (\"publicoas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicoaaa administracao ) OR ( publicoas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicoaaa administracao") OR ("publicoas administration"))))*.