Noun phrases (NP) might be very significant in any languages since it is considered as a basic component to form a meaningful sentence. However, most language can be different to each other in using noun phrases despite sharing a similar structure. In the process of learning and teaching English, it is important and essential to have deep understandings about the similarities and differences between English and Vietnamese NP to minimize mistakes. This study aims to investigate English and Vietnamese noun phrases in terms of semantic- syntactic structure. Through it, it is expected that teachers partly help learners of English to identify the errors that they make in learning English and then avoid making errors. The paper also suggests some teaching implications based on what have been discussed.