This paper attempts to investigate the main difficulties and errors of a group of 20 ethnic students encounter when pronouncing English consonant sounds. The students in the case study come ITom remote areas of Thai Nguyen province in the North of Vietnam. During the time at their school, practicing English in class is rarely used. They have never had chances to speak to foreigners. As a result, they do not have any kind of exposure to a native English environment. The paper has analysed and synthesised the data and found that the ethnic speakers in this case had some particular errors such as omission of final consonant and consonant clusters sounds, as well as difficuties in pronouncing and word stress problems. Finally, the paper suggests appropriate solutions for the kind of errors in order to help leaners inhance English pronunciation.