To meet the needs of innovation, to improve the competitiveness of information technology based on the professional abilities and resources, internal business is not enough, but there is a need to seek external support through business support services such as market search support, trade promotion, legal advice, human resource training, support supply and technology transfer support. There are several services to support businesses and to increase efficiency when they are developed in both quantity and scale of service provision and quality, as well as service structure. So how do we analyze the factors that affect information technology support services in Vietnam? Answering this question helps to suggest solutions and policies to promote the development of the business support service sector and contributes to the rapid development of information technology enterprises in Vietnam. This paper uses information from a survey data of 315 Vietnamese information technology (IT) of small and medium sized enterprises and 460 support service providers in 2018. Data are processed through STATA software version 14.0, and SPSS 20.0 software. The results indicate the Vietnamese business units need to improve to develop the information technology service market, significantly.