这句话中的think of a single search应该怎么翻译?

问题描述:

这句话中的think of a single search应该怎么翻译?
I can’t think of a single search I’ve done where a board has not instructed me to look at sitting CEOs first.

think of a single search 想一个单一的搜寻/ 搜索/ 调查
I can’t think of a single search I’ve done
在我所做之中,我想不出一个统一的调查.
single:语气较强,强调仅此一个,再无第二个.