Hello, i got stuck with my work, to edit multi-lines with conditions

Hello, i got stuck with my work, example please see on attachment.

---Details: i want macro find in column this conditions to remove:

1st is find Hướng dẫn:

2nd is find Question_

3th is find Question_

----then MACRO do:

1st still is Hướng dẫn:

BUT 2nd is " " ( not "" )

3th still is Question_

Thank you, Regards! <3 <3 <3