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