Sure. I mostly rejected the keywords Amazon suggested; they simply weren't all that helpful. However, the ones I used might have been somewhat obvious, since it's a short story anthology.
Here's some of the data:
"short stories" nearly 17,000 impressions, 21 clicks, average cost per click: 19 cents; spent $4.03
"short story anthologies" more than 1500 impressions, 2 clicks ACPC: 23 cents; spent 46 cents
"anthology" nearly 3000 impressions, 2 clicks; ACPC 22 cents; spent 44 cents.
There were other words or phrases that also provided impressions, but several ended up with absolutely nothing. That's important too, as it means I can pretty much ignore some items as I work on targeting ads.
But I aim to massively increase the number of words/phrases I use -- especially with regard to EBP novels, but also on the anthologies.