Yes economy cars will sell well in Bangladesh. Maybe Vinfast can partner with a local firm to conduct CKD and SKD assembly to avoid import duties levied on completed vehicle imports.
Brother
@Viet, Being an automotive industry observer for most of my life, I am yet to be convinced - that launching an unknown luxury automotive marque/brand is a good initial strategy to penetrate any foreign market like the US. Domestically in Vietnam local luxury brand will probably do fine. Of course feel free to ignore my unsolicited advice.
The reason I say this is that Toyota, Nissan and Honda (all first tier Japanese brands) waited fifty years in the US before launching their luxury brands (Lexus, Infiniti and Acura, respectively). Second tier Japanese brands (by sales, not quality exclusively) like Mazda, Mitsubishi and Subaru still don't have luxury offerings in this Market. Hyundai and Kia have some (after being in this market for some thirty five years), but they don't sell all that well. The reason is simple, Luxury vehicles typically do not sell on lower price, they sell on prestige and exclusivity, which are European traits and specialization. But if Vinfast feels it can sell them overseas (maybe US), they are welcome to do so.
To be honest, even the Chinese have hesitated introducing their car brands in the US, though the Volvos (even most American brands like Buicks) contain a majority of parts made in China. For those who do not know, Volvo is a Chinese-owned brand now.