If you find that Candy Crush Level 350 is pretty tricky you need to watch this. A pretty helpful walkthrough guide in order to beat it:

Patricia Frederick’s Tips for Candy Crush Level 350

This level requires striped/wrapped combos to get through the heavy blocks in the bottom row. The row with the bomb dispenser can be tricky so try to create a horizontally striped candy and β€œcarry it along” without exploding it in case you accidentally set off the dispensers. Once you have cleared the blocks beneath the dispensers, the bombs can slip out into play and can be matched or swapped with regular candies.