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