Yes, those moves can get you items, but only by a chance
The only way though is in a horde battle, and if you manage to destory some of the scenery in the battle, you will be given an item, like a leaf stone.
All multi-hitting moves are capable of this, unless the Pokemon in the horde have immunity to it.
Use it wherever you can encounter hordes, also use sweet scent/honey to make it way easier to encounter hordes
(Hope I helped)