Now that's a question. What you need to understand is that they run away because you chase them and it's a fun game.
You have to take the fun out of it. What has worked for me in the past is a spray bottle filled with plain water and set to squirt a stream not a spray.
This is a type of super water pistol and can reach quite a distance. I have used this to control barking with some success. Now they only bark when I am not in range. I'm rearranging that by adding the word "quiet" to the squirting.
This works because dogs, even if they like baths, don't like being squirted. I can reach them right across the backyard and water doesn't cause too many problems on the furniture - it cleans up quickly and easily.
I am suggesting that this will help you control your runaway puppy. You need the word association as well and I would suggest "drop it" or "leave it" as good ones to use.
More tips at http://puppytraining.good-oil.com