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)
"publicoso administration" » "publicaoso administration" (Expand Search), "publicooso administration" (Expand Search), "publicasoso administration" (Expand Search), "publicoso administracao" (Expand Search), "publicos administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicaao administration" » "publicaaao administration" (Expand Search), "publicoaao administration" (Expand Search), "publicasaao administration" (Expand Search), "publicaao 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 ("publicoso administration"))) OR ("publicaao administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoso administration\"))) OR (\"publicaao administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoso administration ))) OR ( publicaao administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoso administration"))) OR ("publicaao administration"))*.