They will deliver to Vietnam which is a part of their AmazonGlobal service where they will even calculate any taxes and duties as part of the checkout process and organise customs clearance so you get your order quicker and to your door.
If you just use the normal Amazon.com website they will ship to Vietnam and much of Asia but the experience can be a little confusing and the biggest problem is finding the items that Amazon will ship there. This often frustrates many and some people assume that Amazon won't ship at all or they won't ship a particular category.
Essentially you can ship dvd's, books, clothing, health, tools. watches, jewelry, shoes, electronics, handbags, toys and more to most countries outside the USA including India.
There is a way to make this process as easy as possible if you follow a few easy steps
Step 1 - Visit the official AmazonGlobal page - This is not the main Amazon homepage so make sure you bookmark or favorite it in your browser now so you can come back to this page whenever you want.
This is still not perfect as not everything listed here will be able to be shipped to you but everything listed can be shipped out of the USA to somewhere so we still have to do steps 2 to 5.
Step 2 - Login to an Amazon Account before you start shopping. If you don't yet have an account create one.
Step 3 - Go into "Your Account" settings page and then click on "Manage Addresses" and setup your address in Oman and then set it as the 1-Click default address. You don't need to turn on 1-Click but the address in your country should be set to the 1-Click default. This allows Amazon to check if an item can be shipped to your default address.
Step 4 - Go Shopping - as you look at every item it will check to see if it can be shipped to your address. If it can't it will indicate so in red writing.
Step 5 - International shipping rates by many merchants can be excessive so it is best to only buy from Amazon who have low shipping rates. In the left hand column click Amazon in the seller box to make sure you are only seeing items sold and shipped by Amazon