The first post says:
On US ETFs you'll get Withholding tax deducted from Dividends at a rate of 30% - although half of this can be claimed back as long as you submit a 1040NR form by April 15 the following tax year.

How is that possible, there is no tax treaty US - Malaysia, how can we get half of the 30% claimed back? Does it refer to dividends from non US stocks (for example VXUS) that has been withheld?
Anyone filing 1040NR with success ?