Run after and Track down

Track down and run after are semantically related in chase topic. In some cases you can use "Track down" instead a verb "Run after", when it comes to topics like look for.

Track down verb - To come upon after searching, study, or effort.

Run after and track down are semantically related in chase topic. Sometimes you can use "Run after" instead a verb "Track down", if it concerns topics such as look for.