From the wikitravel article: "Teach English. Schools licensed to employ foreigners to teach English include D.D. Dragon, Dr Mike's, Kid’s Castle, English First

From the wikitravel article: "Teach English. Schools licensed to employ foreigners to teach English include D.D. Dragon, Dr Mike's, Kid’s Castle, English First and Web International English. Always inquire about a Z-Visa and check that the school has a license from the local government. There are many unlicensed schools, some of which provide a good teaching experience but your passport might not bear up to scrutiny." So there are at least some schools there.