No, they don't, and they usually don't answer to emails asking for it.
You may be lucky finding it at pudn.com or other datasheet-sharing websites, but not officially from them.
It's common with a lot of Chinese companies; they won't answer requests for datasheets, yet you can find them "leaked" elsewhere and they're not really bothered by it.
I suspect it's more of a "we're not interested in answering your questions, which you will certainly have if we give you a datasheet directly" than any real concern over IP.
