“查寻”用英语怎么说

他们正在努力 查寻 那次可怕的火灾的原因.They are trying to find out the reason ( & I { or cause } ) of the terrible fire.谭小姐, 我要的那些档案查寻过了 吗 ?我想看看.Miss Tan , did you look up those files I requested? I'd like to see it.迈可只好要求罗兰德查寻一下埋伏现场...