If you have something/nothing to show for your work or effort, you have/have not won any advantage from it.

I worked for two weeks, and $50 was all I had to show for it. 我工作了两星期，所得到的酬劳只有50美元。

I've been trying to write this essay all day and I have nothing to show for it. 我一整天都在努力写这篇文章，可是没什么进展。