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