ask forsb/sth
—phrasal verbwithaskverbuk/ɑːsk/us/æsk/
If you say you couldn'taskfor someone or somethingbetter, youmeanthat thatpersonor thing is thebestoftheirtype.
找得到（更好的）
She'sgreattoworkfor - I really couldn'taskfor abetterboss.为她工作特开心——我真觉得再也找不到比她更好的老板了。