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)
"publicoosoos administration" » "publicaoosoos administration" (Expand Search), "publicooosoos administration" (Expand Search), "publicasoosoos administration" (Expand Search), "publicoosoos administracao" (Expand Search)
"publicaas administration" » "publicaaas administration" (Expand Search), "publicoaas administration" (Expand Search), "publicasaas administration" (Expand Search), "publicaas administracao" (Expand Search), "publicas administration" (Expand Search), "publica 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 ("publicoosoos administration"))) OR ("publicaas administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoosoos administration\"))) OR (\"publicaas administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoosoos administration ))) OR ( publicaas administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoosoos administration"))) OR ("publicaas administration"))*.