How to handle bad credit debt thats almost 10 years old but it still shows up on my credit reports?

I have atleast 4 major credit debts that was in the early 90’s i thought bad debt only remains on your credit for no longer than 7 years its almost over 10 years but they still show up on my credit reports. Is there anything I can go legally to take those off my credit history, Specially now that I am trying to rebuild my credit.