Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publicosooso administration" » "publicaosooso administration" (Expand Search), "publicasosooso administration" (Expand Search), "publicososooso administration" (Expand Search), "publicosooso administracao" (Expand Search), "publicasooso administration" (Expand Search)
"publico administration" » "publicao administration" (Expand Search), "publicaso administration" (Expand Search), "publicoso administration" (Expand Search), "publico administracao" (Expand Search), "publica 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 ((("publicosooso administration") OR ("publico administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicosooso administration\") OR (\"publico administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicosooso administration ) OR ( publico administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicosooso administration") OR ("publico administration"))))*.