multiple items select with comma in sharepoint2013 usingcode

Question

how can i select multiple items at a time in sharepoint using code 

My team is already using angularjs is ther any help "add" console is working but in not display the values in data

 

We can click "add" button not display any values

 

which code i write the angularjs code in add button for disply 

 

can you give any code for angularjs for multi select print data

 

thank for advance frnds