Mailing packages from Vietnam?

I mailed a large package seamail from Hanoi in mid-August and it still hasn't arrived home in LA.. I'm getting concerned that it won't arrive at all, being that they told me it would take 4-6 weeks! Has anybody else mailed a package from Vietnam, and did it eventually arrive safe? How long did it take? I mailed it just through the general postal system, although in retrospect should I have used a courier such as UPS?