For example, I felt What is the difference between Poorna Avatar and Ansh Avatar as duplicate of Anshavatar and Purnavatar - are there different types of avatars?.
So i tried to close the question What is the difference between Poorna Avatar and Ansh Avatar. But when i tried to close it, i couldn't find the question Anshavatar and Purnavatar - are there different types of avatars? in search box of "Closing > Duplicate".
I tried with different keywords. But i couldn't find it.
What could be reason for this? How should on close such questions? Is this because linked question has no/good answers?