The context is a little clearer now...
"You essay completely fails to explain how you did all the interview stuff. Please explain this, even by adding one or two sentences."
"stuff" is a very general word, what stuff?
"even by" I find a little awkward.
"Your essay fails to explain how you did the interview. In a sentence or two, please explain the interview process."
I did not include "stuff" because I dont know what it refers to in this example. So I used process. What is the "stuff" the sentence is refering to?
Chris
http://www.hearseesay.com