(VOVworld)- Argentinean President Cristina Fernandez de Kirchner on Friday started her 4-day visit at the invitation of President Truong Tan Sang. The visit is expected to boost the friendly relationship between the two countries which have developed over the past 40 years. In 2011, Vietnam’s export to Argentina increased sharply totaling more than 160 million USD, an increase of 76%. By October last year, two-way trade topped more than 870 million USD, 4% higher than the same period of the previous year.