Trung Nguyen is trying to change that by marketing unique coffee products and is also working with its coffee farmers to try to improve quality and efficiency.

Ma Chuong, who has been farming coffee beans for more than 30 years, says a company-financed drip irrigation system saves on water and labor and is more productive.

"In the first year before we had this system our productivity was only 800 kilograms per hectare. But, in the second year after installing this system, productivity went up to 1,400 kilograms per hectare," she explains. "Last year, from our notes from start to end of harvest, productivity was 2,040 kilograms."

But according to Le Ngoc Bau, director of Vietnam's Western Highlands Agro-Forestry Scientific and Technical Institute, Vietnam's coffee production and exports may soon peak. He thinks the country's status as number-one coffee exporter will not last.

"Firstly, Vietnam's government has no policy to expand the area for coffee," he notes, "In August of 2012 the Minister of Agriculture made the decision to approve the master plan to develop the coffee industry to the year 2020 and our vision up to the year 2030. For this master plan to the year 2020 the total area of coffee in Vietnam will be reduced to 500,000 hectares."

In the meantime, coffee industry insiders say that while exports may level off, they can still work to improve quality.