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)
"publicooaaas administration" » "publicaooaaas administration" (Expand Search), "publicoooaaas administration" (Expand Search), "publicasooaaas administration" (Expand Search), "publicooaaas administracao" (Expand Search)
"publicoao administration" » "publicaoao administration" (Expand Search), "publicooao administration" (Expand Search), "publicasoao administration" (Expand Search), "publicoao administracao" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas 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 ("publicooaaas administration"))) OR ("publicoao administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicooaaas administration\"))) OR (\"publicoao administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicooaaas administration ))) OR ( publicoao administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicooaaas administration"))) OR ("publicoao administration"))*.