920m is pretty weak u know
M-series GPU had less resource than it's rival in PC gaming, as they need to fit the whole thing in a laptop
not surprising if u can't play those demanding games with high fps
but here's something u can try:
setting the Nvidia control panel to performance
setting your battery usage to performance
closing other apps before playing to make sure the burden is as low as possible
get a external cooler for your laptop to prevent early thermal throttle
clean the startup settings on task manager, make sure only the core apps (necessary stuff) enabled
edit: some fix on spelling and btw, lowering your resolution as what Husseo19 mention might work too