You might be interested to know this.

You might be interested to know this. What a coincidence !!!
○ คุณอาจสนใจที่จะรู้เกี่ยวกับเรื่องนี้
You might be interested to know this. 
You might be interested in knowing this.

○ coincidence - ความบังเอิญ, เรื่องบังเอิญ

#SimplifiedEnglishByPLTrans

S + V.to be + interested to know + ....
S + V.to be + interested in knowing + ....

I am interested to know more about you.
I am interested in knowing more about you.