The purpose of this study is to find out pronunciation mistakes made by non-English majors at Hanoi Open university, thereby proposing solutions to help students improve their pronunciation. The study data were collected from 133 first-year students in Economy and Law department at Hanoi Open university through an online questionnaire. The study used quantitative method in combination with statistical and analytical techniques. The results showed that students recognized the crucial role of pronunciation in the learning process. However, the study also provided information on students’ mistakes when learning pronunciation. Students’ mistakes mainly related to mispronouncing plural noun endings, stress, linking sounds and intonation. Some suggested solutions for teachers and students have been proposed such as: taking advantages of technology, using free applications, diversifying classroom activities.