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