Nhờ sửa bài giúp

Hi guys!

I was taking english classes during one year, but pitifully many times I couldn't assist, because the classes were on the same schedule that my job.

I can read a scientific article or a technical report with not many problems, but I have important grammatical mistakes.

So, I wish to improve my english and I would appreciate your corrections to the next text: Appreciated workers, I'm here to advise them about several changes for advantage of everyone. FIRST.

I'll make changes on the supervisor's schedule, who from the next monday could choose the schedule that they want, even if they can do an extra effort to look happy when we have visits. SECOND.

The cheff will make coffe every morning to all the personal. THIRD.

I have made the decision to fired the middle of advisors, because everyone wants to give instruction, but no one wants to get down to work. FOUR.

I'd like to introduce George Lemus as a new boss of Synthesis Department, and his words will take as a law.

Finally, I'd want to remind that we're promoting the construction of the new Chemical Engineer Museum with all our equipement out of service and to the opening will make a literaly contest (concurso literario) with the topic "five reasons why I hate my boss", the most original essay will win a trip to the Oktoberfest in Germany, with all the beer that can drink.

That's all, now BACK TO WORK!

Best regards ;)