I was trying to find them underground but I Searched so long by those glitters on the map but I cant find a glitter in the wall is that a bug
Have you frequently touched the touchscreen? That should allow for those little glittery spots indicating an item to appear on the walls or on the top map. Try moving around a bit more and maybe leave and return underground to refresh. If that doesn’t help, try restarting your game, and make sure your touch screen is working correctly.