There are 2 adjusting screws. One for up and down. One for left and right. The screw looks like a gear/pinion instead of a normal screw head. You can use a philips screwdriver to adjust. I can't find a picture in google. You try and look for it. If you still can't find it, i try to take a picture of mine tomorrow.
the up-down screw is fairly easy to find. There is a hole that lets you dip a screw driver right in to turn the screw. The left-right one is a bit blocked by wires (in my car).
thanks veloc, ive already try adjust the both screw, but the headlight still same.when drive in the night or raining, very diffult to see beacuse the light very low