COCA语料库有no matter that+从句271个例句。BNC有23个例句。

以下为部分例句：

COCA

 He would have to ride with Deakins in the mail car, no matter that it irked the sorting clerks

 His choice of my five daughters is you. No matter that your sisters are married. Lamsa chooses you. He came here for you.

 Beady doesn't stomach anyone calling him chicken, no matter that the namecaller is his oldest and best friend in Arkadelphia.

 We do not always want the help of our friends, no matter that the popular song says that this is how we get by.

So she was considered too much of a menace to leave unrestrained, no matter that she'd only been fighting to defend herself. 

BNC

Now notice that no matter that I've been careful, my hands have got printing ink on them.

 I dread going to church when he's home. No matter that I'm dressed up in my Sunday clothes.

They do this because they are not as quick as the opposition and want to give themselves as much time as possible to play the ball, no matter that they also give the other player more time.

So great was my obsession that I used to wish that one day I would develop my own American accent. No matter that I had little knowledge of regional variety. 

从以上语料库例句可知，no matter that意义相当于although从句。但也可以独立成句。当独立成句时，它等于 it is/was no matter that..., = It doesn't/didn't matter that...,= It is/was not important that.