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)
"publicaaas administration" » "publicaaaas administration" (Expand Search), "publicoaaas administration" (Expand Search), "publicasaaas administration" (Expand Search), "publicaaas administracao" (Expand Search), "publicas administration" (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)

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 ("publicaaas administration"))) OR ("publicoso administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaaas administration\"))) OR (\"publicoso administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaaas administration ))) OR ( publicoso administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaaas administration"))) OR ("publicoso administration"))*.