How can I install Skype on my NexusOne phone? I search for Skype in Android Market application and cannot find it. I live in Vietnam.
Skype publish their app directly into specific country's Android Markets, they don't publish it to the "Rest of the world Market", Vietnam doesn't have its own Market, it uses the "Rest of The World Market".

Skype's FAQ says: 


  Why can’t I download Skype from the
  Android Market?
  
  The Android Market only distributes
  applications in certain countries, so
  it’s possible that your location isn’t
  supported. To find a full list of
  supported locations, please visit
  Android Market Developer Help.
  
  If you live in a country that's not
  listed,  then you can still download
  Skype for your Android phone from
  GetJar.com. Simply search for “Skype”
  and download it for free.