B\u00e0i 30: V\u1ea5n \u0111\u1ec1 ph\u00e1t tri\u1ec3n ng\u00e0nh giao th\u00f4ng v\u1eadn t\u1ea3i v\u00e0 th\u00f4ng tin li\u00ean l\u1ea1c<\/a><\/blockquote><\/iframe>