This will prevent Vũ from sending you messages, friend request or from viewing your profile. They will not be notified. Comments on discussion boards from them will be hidden by default.
“I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.”
―
Maya Angelou
“It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived at all—in which case, you fail by default.”
―
J.K. Rowling