Thanks for your support.
Đúng là mình bị sai Technologic modern devices.
Còn dưới đây là phần góp ý của 1 bạn người nước ngoài ở web khác, nếu bạn muốn tham khảo thêm có thể xem nha:
1. It should be "technologically modern devices are more and more common such as laptops, tablets, smart phones and so on."
2. It should be "These devices and the internet allow businessmen in different cities to interact without meeting each other"
3. It should be "This helps them save a lot of time. Nowadays, all companies use email as a formal and casual method of communication."
4. It should be "Secondly, services like Skype and Zalo create new possibilities for relationships between students and teachers."
5. It should be "For example, a student can learn English with there teacher through the internet without leaving there house. In addition, teachers can upload educational documents for students to download and use"
If you need any more help just message me!