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)
"publicosoos administration" » "publicaosoos administration" (Expand Search), "publicoosoos administration" (Expand Search), "publicasosoos administration" (Expand Search), "publicosoos 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)

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 (\"publicaaas administration\"))~".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicosoos administration ))) OR ( publicaaas administration ))~.
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicosoos administration"))) OR ("publicaaas administration"))*.