Hey Jing,
Thank's by the quick response.
I read this doc, but the doc that I'm talking refers to offline map generated directly from ArcGIS online as you can see: Utilizar mapas da web offline—Ajuda do ArcGIS Online | Documentação
We are talking about different ways to produce offline maps.
In the documentation above have an item that allows you to put your layer offline and available to download.
If I read correctly all vectors in the web map are converted to a VTPK package, to download in Survey and other apps.
But it's not working like the documentation says.
Cheers,
Bruno