"And I suppose you just happened, by some strange coincidence, to be around at that particular moment!"

By a strange coincidence it was also Planet 3 of this particular system.

What a strange coincidence that she should meet him at the Academy!

It was a strange coincidence that the two were up for sale in the same season.

Nothing is talked about here today except the strange coincidence.

On top of that there had been a strange coincidence.

It just seems another strange coincidence to have happened at this time.

It may have been nothing more than a strange coincidence.

"It would be a strange coincidence if the two events were not connected."

"By some strange coincidence, the ones who had been giving the orders."