Search particular CheckBox in a CheckBoxList depending up on the value entered in TextBox

Hi,
   I am developing a project where i need to bind around 3000 variables in a CheckBoxList by their description and get their values from original variable.
Ex:  Variable                Description
         US              United States Of America
1.  I have to show United States Of America in the CheckBoxList and get US while selecting that .
2. I have to take a TextBox and what ever i typed ( not the TextChanged event) in that TextBox the CheckBoxList will behave like the picture below
http://postimg.org/image/9xzaiu907/