This level is a bit harder than Day 7, because it features the fourth symbol (the bucket symbol) to keep track of. Nevertheless, the level is still rather simplistic. Just remember to keep track of which symbol is with which camel sign and be sure to prioritize destroying the symbols closer to the house.
Tap on the zombies quickly, preferably the ones closer to the left to kill them. Less combinations may occur though, as an extra symbol is added.
It is not advised to use the turbo button on this level, as this will just make the zombies move faster and make it harder to match quickly.