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