Idiom
go after somethinggo after (someone/something)
1.
to attack or try to hurt someone or something.
The candidate went after his opponent in a very personal way.
2.
to try to get or obtain someone or something.
There are a lot of people going after a piece of the budget, and some of them won't get any funding.I know I'll never fall into the trap of going after the big bucks.