Like GLV said, there is nothing complicated and no complicated "instructions" are needed. Without getting too specific, it is really simple. The screws on S&W sights have right-handed threads. Turn to the right, clock-wise, tightens (pulls the sight leaf down) and turning left loosens (lets the leaf rise). Raising the sight raises the point of impact, and lowering the sight lowers the group, just that simple.
If you see no movement from the sight as the elevation nut (it isn't a screw, just looks like one) is turned either direction there is a problem with the sight, doubtless because someone was screwing (no pun) with it in the past and it is damaged. I don't understand your remark that turning the adjustment either way "Made it worse". The sight had to be going up or down unless damaged, then it could have done nothing.
There used to be a sheet with S&W target sighted revolvers that explained making adjustments, but it was basically just pictures showing which direction to turn the adjustments to get the desired result.
As you turn the elevation adjustment watch the gap under the rear of the leaf, the part that has the windage slide in it. As you turn the elevation right hat gap should get noticeably narrower. Conversely, as you turn right it should get wider. Just be careful how far up you let the sight rise. If you go too far the elevation nut will come off the stud it mates with and then you will have a problem. If the gap is larger than 1/4" already that is what has happened, and you should take it to a shop that understands the mechanics of the sight to have them put it right. This means NOT the average pawn shop, hardware store, or such, but a real gun shop that has a gunsmith. If you tell us where you are there is likely a member who will be happy to meet with you and take a look at the gun for you, and probably be able to fix it for you.
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