Hi Bdog, I'm using EPP (Pacific Rim less Japan) as my geo fund for that area. I don't see Viet Nam listed, so if there, it's less than 5% of total assets right now.
The iShares MSCI Pacific ex-Japan Index Fund seeks investment results that correspond generally to the price and yield performance, before fees and expenses, of publicly traded securities in the Australia, Hong Kong, New Zealand, and Singapore markets, as represented by the MSCI Pacific Free ex-Japan Index.
You might check the fund sponsor, I-Shares, to see if there's more info on what ETFs have minor representation of Viet Nam in the funds.
Best regards, Tom