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)
"publicaaas administration" » "publicaaaas administration" (Expand Search), "publicoaaas administration" (Expand Search), "publicasaaas administration" (Expand Search), "publicaaas administracao" (Expand Search), "publicas administration" (Expand Search)
"publicaaos administration" » "publicaaaos administration" (Expand Search), "publicoaaos administration" (Expand Search), "publicasaaos administration" (Expand Search), "publicaaos administracao" (Expand Search), "publicas administration" (Expand Search), "publicos 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 ("publicaaas administration"))) OR ("publicaaos administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaaas administration\"))) OR (\"publicaaos administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaaas administration ))) OR ( publicaaos administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaaas administration"))) OR ("publicaaos administration"))*.