Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publicaaaosoa administration" » "publicaaaaosoa administration" (Expand Search), "publicoaaaosoa administration" (Expand Search), "publicosaaaosoa administration" (Expand Search), "publicaaaosoa administracao" (Expand Search)
"publicas administration" » "publicaas administration" (Expand Search), "publicoas administration" (Expand Search), "publicosas administration" (Expand Search), "publicas administracao" (Expand Search), "publica administration" (Expand Search), "publico 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 ((("publicaaaosoa administration") OR ("publicas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicaaaosoa administration\") OR (\"publicas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicaaaosoa administration ) OR ( publicas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicaaaosoa administration") OR ("publicas administration"))))*.