Hi the sonography does show the presence of stones in kidney. The size of the stone in left kidney is small  around 5 mm so nothing to worry. The right side of the kidney shows some swelling which could be due to some stone which may have passed . Don't worry about that. However what problems are you having currently? Any pain? Difficulty in urination? Etc Also any blood tests, cbc, creatinine etc done??.. Kindly consult a Nephrologist so he can evaluate you and guide you further, also evaluate for causes of recurrent stone. Also if you can collect the stone and if it is sent for analysis, we can determine the exact stone type and give you exact diet based on that. However in general tips for  preventing recurrent kidney stones- Drink plenty of water/ liquids Restrict salt Restrict high protein diet/ animal foods Avoid calcium supplements