Moreover, the next two years in 2015 Thailand will join the ASEAN declaration (Association of South East Asian Nations: ASEAN). The ASEAN Charter in article 34 of the ASEAN states to use English as a working language of ASEAN. It means that people in the 10 countries of ASEAN should learn more English language because learning and using English are important for everyone to find work and the good opportunities for life. Helping the English users to be successful in learning of four English skills including listening, speaking, reading and writing, vocabulary is one of the most factors.