🚀 go-pugleaf

Hello,

I'm trying to find out what can allow to to copy portions of a line
without using the mouse.  E.g.  Lets suppose I have the following line 

"components and the two detectors \tsub{D}{1} and \tsub{D}{2}..."

If I want to just pick up "\tsub{D}{1}" and put it in a buffer how can I
do this ?  I've been trying to place the curseor before \tsub{D}{1} and
then trying to copy till the very next white space.  I know emacs can do
this but can vi?  If so please let me know the command to do this.

Thanks

Anand