Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publico administration" » "publicao administration" (Expand Search), "publicaso administration" (Expand Search), "publicoso administration" (Expand Search), "publico administracao" (Expand Search), "publica administration" (Expand Search)
"publicosaoooas administration" » "publicaosaoooas administration" (Expand Search), "publicasosaoooas administration" (Expand Search), "publicososaoooas administration" (Expand Search), "publicosaoooas administracao" (Expand Search), "publicasaoooas 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 ((("publico administration") OR ("publicosaoooas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publico administration\") OR (\"publicosaoooas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publico administration ) OR ( publicosaoooas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publico administration") OR ("publicosaoooas administration"))))*.