Would you show about the "can't work 'em" in the script?

I can't see his saying, "Can't work 'em!"
in the script.
I try to make the full sentence for it because I'm gonna check out the thing for me to understand.

"He(= Chandler) can't work them(=his plan for messing with Phobe")

--------The script goes: ----------------

[Cut to the hallway where Phoebe is conferring with Rachel.]
Phoebe: He's not backing down. He went to get lotion.
Joey: (entering the hall) Oh man! Aren't you guys done yet?! I wanna sit in my chair!
Rachel: Joey look, just look at it this way, the sooner Phoebe breaks Chandler the sooner this is all over and out in the open.
Joey: Ooh!
Rachel: Okay!
Joey: I like that! (To Phoebe) Oh, okay! Show him your bra! He's afraid of bras! Can't work 'em! (He swiftly rips open the front of Phoebe's dress revealing her bra.)
Phoebe: Joey! (Examining the dress.) Wow, you didn’t rip off any buttons.
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I write down The site for full scripts of this episode  for you to see my question well.

http://ufwebsite.tripod.com/scripts/514efo.htm