幸有她爹喜哥玛，给出建议顶瓜瓜。

Now I have two questions.1) One is that do you guys think it is possible for them to give me offer again?
-- Yes, Yes!

2) Should I ask the hiring manager by myself or through recruiter? I still have the hiring manager's contact infor.

-- Yes, call and talk.
-- Be sure know how to talk and what to talk.
-- Wish you good luck!