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