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)
"publicoos administration" » "publicaoos administration" (Expand Search), "publicooos administration" (Expand Search), "publicasoos administration" (Expand Search), "publicoos administracao" (Expand Search), "publicos administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicooaoao administration" » "publicaooaoao administration" (Expand Search), "publicoooaoao administration" (Expand Search), "publicasooaoao administration" (Expand Search), "publicooaoao 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 ("publicoos administration"))) OR ("publicooaoao administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoos administration\"))) OR (\"publicooaoao administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoos administration ))) OR ( publicooaoao administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoos administration"))) OR ("publicooaoao administration"))*.