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)
"publicososs administration" » "publicaososs administration" (Expand Search), "publicoososs administration" (Expand Search), "publicasososs administration" (Expand Search), "publicososs administracao" (Expand Search)
"publicoa administration" » "publicaoa administration" (Expand Search), "publicooa administration" (Expand Search), "publicasoa administration" (Expand Search), "publicoa administracao" (Expand Search), "publica administration" (Expand Search), "publico 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 ("publicososs administration"))) OR ("publicoa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicososs administration\"))) OR (\"publicoa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicososs administration ))) OR ( publicoa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicososs administration"))) OR ("publicoa administration"))*.