没买到用英语怎么说

(for some reason) didn't buy

一双粉红色的拖鞋

I didn't buy the pair of pink slippers.
I did not manage to buy the pair of pink slippers.

去买了而因为某种原因“没买到”，not able to buy 。

haven'g bought something.

I didn't by ...(我没买到...)
That is a pair of pink slippers.(那是一双粉红色的拖鞋)