To make Licorice Swirls spawn you first have to free at least one of the Magic Mixers. This means you have to make special candies you can use to clear the Licorice Locks. Once a Magic Mixer is freed is will start spawning Licorice Swirls. It will become quite a bit easier if you quickly free both Magic Mixers.
To make Chocolate spawn you have to clear the Icing adjacent to the Chocolate Spawner. Try to clear the Icing as quickly as you can. Not only will this start the spawn of Chocolate, it will also make it a bit easier to match candies.
With candies of four colors on the playing field you shouldn’t have too many problems making special candies. Consider holding on to special candies until you can combine them because of the combination’s enhanced effect.
Match candies near the bottom of the playing field (or as low as possible) as often as you can. Doing this will shift the largest amount of candies. This in turn will hopefully start a chain reaction that will create new opportunities to make special candies.