Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publicosoos administration" » "publicaosoos administration" (Expand Search), "publicoosoos administration" (Expand Search), "publicososoos administration" (Expand Search), "publicosoos administracao" (Expand Search)
"publicas administration" » "publicaas administration" (Expand Search), "publicoas administration" (Expand Search), "publicosas administration" (Expand Search), "publicas administracao" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search)

You may be able to get more results by adjusting your search query.

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