When I use esri/dijit/Search on my Feature layer it returns nothing.
I use the same code as the link only replace the layer url and fields for search:
Search with customization | ArcGIS API for JavaScript
I tried another layer on arcgis online and its "name" field , the search returns nothing.
The layer url is :
It seemed to work ok for me. See this test app using the same url - JS Bin - Collaborative JavaScript Debugging
Paste the following into the Search box: 广东省
For the esri/dijit/Searches source for FeatureLayer, it only supports the version of the service 10.3 or above.