Dear Sir,
1.I/see/school's advertisemeent/Tuoi Tre Newspaper/yesterday.
2.I/interested/learn/English/I/like/information/your school
3.I/study/English/over four years/but/want/improve/speaking/and/listening/skill.
4.I/be/very grateful/if/you/send/details/courses/fees
5.I/look/forward/hear/you/soon.
Your sincerely