The only thing you have to focus on during this level is keeping the amount of blockers that spawn from the Mystery candies to a minimum. The quicker you clear the blocker that spawn the easier it will be to make and combine special candies. It will also mean there will be more Mystery candies on the playing field.
Before you go all out combining special candies, first check whether you can match Lucky candies. Oftentimes you will be able to make one or two combinations. Doing this will remove some of the Lucky candies and replace them with regular candies. When you make a combination with a Color Bomb candy you want at least a few regular candies on the conveyor Belts.
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.