Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search), "public administracao" (Expand Search)
"publicooaas administration" » "publicaooaas administration" (Expand Search), "publicoooaas administration" (Expand Search), "publicasooaas administration" (Expand Search), "publicooaas administracao" (Expand Search)
"publicooosa administration" » "publicaooosa administration" (Expand Search), "publicoooosa administration" (Expand Search), "publicasooosa administration" (Expand Search), "publicooosa administracao" (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 ("publicooaas administration"))) OR ("publicooosa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicooaas administration\"))) OR (\"publicooosa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicooaas administration ))) OR ( publicooosa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicooaas administration"))) OR ("publicooosa administration"))*.