Hello,
I have 16 adult/sub adult C.orientals (Chinese Fire Belly)newts. Of all these newts, only one subadult prefers land area (and she expects to be handfed). In my experience, these newts are closer to fully aquatic than semi aquatic. A few choosing to rest a bit on the elodea provided for them, but never the land areas. The majority of the time, they are fully submerged, either resting, or foraging. I could not envision my newts going to land and hunting woodlice (they'd probably expect me to hand them one).
IMO the best way to keep this species of newt is in an aquarium either 1/2 to 2/3 full of water, with floating land areas. Either keep the tank bare bottom, or provide a feeding dish for their food. I feed thawed, rinsed, bloodworms, and earthworm pieces.
The advantage of having aquatic species is that you can see them most of the time. This helps you to monitor their behavior and health, not to mention viewing pleasure.
Should you prefer a terrestrial setup, you might want to keep another species.