It all depends on the size of terrarium. Most common plants for small terrarium are forest moss, air plants, and pothos vine. However, if you have a tank that's bigger than 30 gallon, than you can grow codiaeum variegatum or chinese money tree.
I have some lucky bamboo in with my gargoyles. It's in a narrow container anchored by stones and up against the wall. Nothing else has worked for me; they tromp on everything!