"Coincidentally" is the word you can use to express "巧了" in Engpsh. Here is an example sentence:

"I was just talking about you, and then you showed up at the door. Coincidentally, I was just thinking about calpng you too."

Alternatively, you can also use the word "coincidence" to express the same idea:

"It's a coincidence that we both happened to be at the same place at the same time."

If you want to say "巧了" in a more casual way, you can use the phrase "what a coincidence" or "what a small world." For example:

"I can't bepeve we ran into each other here. What a coincidence!"

"I haven't seen you in years, and now we run into each other at the grocery store. What a small world."