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)
"publicaaoas administration" » "publicaaaoas administration" (Expand Search), "publicoaaoas administration" (Expand Search), "publicasaaoas administration" (Expand Search), "publicaaoas administracao" (Expand Search)
"publicoaa administration" » "publicaoaa administration" (Expand Search), "publicooaa administration" (Expand Search), "publicasoaa administration" (Expand Search), "publicoaa administracao" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas 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 ("publicaaoas administration"))) OR ("publicoaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaaoas administration\"))) OR (\"publicoaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaaoas administration ))) OR ( publicoaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaaoas administration"))) OR ("publicoaa administration"))*.