How to use auto complete?

Hi! Im new on nvim environment, so I dont know much about keybinding. Maybe this issue is my skill issue. how to use the auto complete, such as `vuedc` or auto import?

edit: I cant play the video. Maybe I compress it wrong. I upload a new video, hope it work!

https://github.com/user-attachments/assets/844324d3-c239-48ab-9816-2acf2e7aec7f

