Use this path hints we check template path. This is usefull for search file.
Lets start...
1. Login admin
2. Go to System > Configuration > Advanced > Developer
Before change developer setting change store view like this below image..
Select English or different store....
After go in 'Debug' > Template Path Hints -> Yes and save
Refresh site and show path in red color like this...
And remove the template path hint then select 'Debug' > Template Path Hints -> No and save.
Any other article get product details by sku