Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicaas administration" » "publicaaas administration" (Expand Search), "publicoaas administration" (Expand Search), "publicasaas administration" (Expand Search), "publicas administration" (Expand Search), "publica administration" (Expand Search), "publicos administration" (Expand Search), "publicass administration" (Expand Search)
"publicaa administracao" » "publicaaa administracao" (Expand Search), "publicoaa administracao" (Expand Search), "publicasaa administracao" (Expand Search), "publica administracao" (Expand Search), "publicas administracao" (Expand Search), "publico 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 ("publicaas administration"))) OR ("publicaa administracao"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaas administration\"))) OR (\"publicaa administracao\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaas administration ))) OR ( publicaa administracao )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaas administration"))) OR ("publicaa administracao"))*.