Unlike the US, Vietnam is a net importer of fuel. It imports over 40 million tons of coal per year:

https://statbase.org/data/vnm-coal-imports/

It also started importing liquid natural gas in 2023.

But it has abundant sunlight, access to low cost Chinese solar panels that will produce electricity for decades instead of being burned once, and a substantial domestic photovoltaic manufacturing industry of its own.

"Renewable Energy Investments in Vietnam in 2024 – Asia’s Next Clean Energy Powerhouse" (June 2024)

https://energytracker.asia/renewable-energy-investments-in-v...

In 2014, the share of renewable energy in Vietnam was just 0.32%. In 2015, only 4 megawatts (MW) of installed solar capacity for power generation was available. However, within five years, investment in solar energy, for example, soared.

As of 2020, Vietnam had over 7.4 gigawatts (GW) of rooftop solar power connected to the national grid. These renewable energy numbers surpassed all expectations. It marked a 25-fold increase in installed capacity compared to 2019’s figures.

In 2021, the data showed that Vietnam now has 16.5 GW of solar power. This was accompanied by its green energy counterpart wind at 11.8 GW. A further 6.6 GW is expected in late 2021 or 2022. Ambitiously, the government plans to further bolster this by adding 12 GW of onshore and offshore wind by 2025.

These growth rates are actually much faster than growth rates in the US.