Read English newspapers daily and attempt to assess difficult thoughts. The More you use it the more knowledge you have it and also the more successful you end up being. For example, let an English school be conceived. http://irene.tmf-ev.de/web/vanthang/home/-/blogs/10-co-so-hoc-tieng-anh-giao-tiep-o-a-nang-uy-tin-nhat