“To come up with” is a three-word phrasal verb which means “to create/ generate/ find” most typically with relation to ideas. You can also use it in other situations.
Can you help me come up with some ideas for the new ad campaign?
I can’t come up with any interesting ideas for the annual employee dinner.
I always come up with my best ideas just before I fall asleep.
He finally came up with the capital to finance his business.
I thought I had no food in my kitchen, but, after looking around, I finally came up with enough ingredients for a great meal!