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