There are hundreds of variations of similar hinges.
If its the type I think then check the bolts top and bottom for a line, dot or arrow first (some are ovlo shaped cams so they also rotate slightly 360 degree as well as adjusting up and down) just make sure the mark is in the same direction once you finish your up/down adjustment.
Loosen the grub screws on the side, loosen the top bolts and tighten the bottom bolts equally. Make sure your marks are in the same direction then re-tighten the top bolts and grub screws