The problem is due to the misalignment of the striker bolt on the car chassis - it's that metallic U rod that holds the car door closed. As the chassis flexes when you drive, the striker bolt rubs against the catch, causing the tik tik sound you hear.

To solve this, you have to realign the striker bolt. The screws require a Torx, which would be the only problem you face as its quite difficult to source. The size is T11 if I'm not mistaken, so make sure it fits before you buy them. It'll cost you less than RM10, and it looks like an oversized Allen key.

Loosen the two screws, and use your finger to tighten them. Close and open the door a few times to get the striker bolt properly into place, then screw a quarter using the key. Rinse and repeat until the screws are very snug and tight (the amount of strength you used to loosen the screw will be an estimate on how tight it should be) and you should have a tick-free door after that.

Hope it helps for you.