Nhờ sửa bài giúp

Regarding my travel history, as I mentioned before, I have been to Chile and Colombia, travelled as a tourist and saw what other countries look like, since then I am sure that studying abroad is something I have to do in order to improve my skills to a higher level.

I am completely sure I am going to successfully complete this diploma.

I am seeking to make the world a better place and I believe that hard work, honesty and respect is what lead me and my company to this moment, I have been saving up money to study what I always wanted.