Add a large number of free courses in Vietnamese (#11866)

* Add Android courses to the list of free courses in Vietnamese

* Add ASP courses to the list of free courses in Vietnamese

* Add Assembly courses to the list of free courses in Vietnamese

* Add AutoIt courses to the list of free courses in Vietnamese

* Add Bash courses to the list of free courses in Vietnamese

* Add C courses to the list of free courses in Vietnamese

* Add C++ courses to the list of free courses in Vietnamese

* Add C++ index to the list of free courses in Vietnamese

* Add C# courses to the list of free courses in Vietnamese

* Add Cấu trúc dữ liệu và Giải thuật courses to the list of free courses in Vietnamese

* Add Dart courses to the list of free courses in Vietnamese

* Add ExpressJS courses to the list of free courses in Vietnamese

* Add Flutter courses to the list of free courses in Vietnamese

* Add Git courses to the list of free courses in Vietnamese

* Add Go courses to the list of free courses in Vietnamese

* Add HTML and CSS courses to the list of free courses in Vietnamese

* Add Java courses to the list of free courses in Vietnamese

* Add JavaScript courses to the list of free courses in Vietnamese

* Add jQuery courses to the list of free courses in Vietnamese

* Add Vue.js courses to the list of free courses in Vietnamese

* Add Kotlin courses to the list of free courses in Vietnamese

* Add Machine-Learning courses to the list of free courses in Vietnamese

* Add MongoDB courses to the list of free courses in Vietnamese

* Add MySQL courses to the list of free courses in Vietnamese

* Add Next.js courses to the list of free courses in Vietnamese

* Add NodeJS courses to the list of free courses in Vietnamese

* Add PHP courses to the list of free courses in Vietnamese

* Add PostgreSQL courses to the list of free courses in Vietnamese

* Add Python courses to the list of free courses in Vietnamese

* Add R courses to the list of free courses in Vietnamese

* Add React courses to the list of free courses in Vietnamese

* Add Ruby courses to the list of free courses in Vietnamese

* Add Rust courses to the list of free courses in Vietnamese

* Add Sass courses to the list of free courses in Vietnamese

* Add Security courses to the list of free courses in Vietnamese

* Add SQL courses to the list of free courses in Vietnamese

* Add SQL Server courses to the list of free courses in Vietnamese

* Add Swift courses to the list of free courses in Vietnamese

* Add TypeScript courses to the list of free courses in Vietnamese

* Add Angular courses to the list of free courses in Vietnamese

* Add Unity courses to the list of free courses in Vietnamese

* Add Wordpress courses to the list of free courses in Vietnamese

* fix: Put lists in alphabetical order

Author: tmsanghoclaptrinh