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)
"publicaaos administration" » "publicaaaos administration" (Expand Search), "publicoaaos administration" (Expand Search), "publicosaaos administration" (Expand Search), "publicaaos administracao" (Expand Search), "publicos administration" (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.

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