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)
"publicaaaas administration" » "publicaaaaas administration" (Expand Search), "publicoaaaas administration" (Expand Search), "publicasaaaas administration" (Expand Search), "publicaaaas administracao" (Expand Search)
"publicasooa administration" » "publicaasooa administration" (Expand Search), "publicoasooa administration" (Expand Search), "publicasasooa administration" (Expand Search), "publicasooa 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 ("publicaaaas administration"))) OR ("publicasooa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaaaas administration\"))) OR (\"publicasooa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaaaas administration ))) OR ( publicasooa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaaaas administration"))) OR ("publicasooa administration"))*.