Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicos administration" (Expand Search)
"publicosoos administracao" » "publicaosoos administracao" (Expand Search), "publicoosoos administracao" (Expand Search), "publicososoos administracao" (Expand Search)
"publicas administration" » "publicaas administration" (Expand Search), "publicoas administration" (Expand Search), "publicosas administration" (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 ("publicosoos administracao"))) OR ("publicas administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicosoos administracao\"))) OR (\"publicas administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicosoos administracao ))) OR ( publicas administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicosoos administracao"))) OR ("publicas administration"))*.