There is stacks of information on the internet about Asian vegetables. This is quite a good one,
And has links to other websites with information. Also if you go to our friend Goggle and type in asian vegetables + agriculture you will get more technical sites, mainly Australian, that raise some of the issues regarding the commercial aspects of asian vegetable production and marketing information. For most of the vegetables it gives the Dutch name of them, which may prove useful to you.
This is a fantastic thesaurus, that lists Asian Vegetables I had never heard of and gives pictures as well.
I agree we have to help our farmers where we can, diversification, the buzz word of the agricultural industry, is the key. My grandfather was a very traditional Australian sheepfarmer, who had to sell his farm when he got melanoma from spending all his hours slaving for little money in the hot sun, as there were no cancer treatment centres in his area. Unfortunately his farm was sold to a huge company and has lost its identity. Nothing of my family, that had it for generations, remains there now.