What is thnuclnt, vmware
Solution 1:
That process is used for VMware's virtual printing feature. They sit around waiting for data from virtual machines. (You can quit them with Activity Monitor if they're in the way, with no ill effects.)
Solution 2:
If you have any VMware Fusion guests running, open up the Settings -> Printers and disable this feature. This usually will stop the thnuclnt service.