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