In case there is someone who doesn't know Sina... (I also figured it out after logging in to Seongyesa for the second time and reading various posts ㅠㅠ hahaha)
 
In Seongyesa, the name of the plastic surgery clinic is not directly mentioned, for example, "Kanada plastic surgery." I found a lot of posts where "surgery" was written like "ㄱㄴㄷ plastic surgery", but when I searched for it on Naver, it didn't come up very well.
 
So I typed "ㄱㄴㄷ plastic surgery" on Google and it came up fine!!! If you are trying to find it on Naver, you can use Google to find it :)
 
Or you can search for “Gangnam Plastic Surgery initial vowel” and it will come up!!