M in Power Query: If with AND, OR

Hello,

Would you please help to guide me on add column in Power Query:

If Query contains Term 1, or Term 2, AND Domian is domain0, then in added column, fill "Keywords"

If Query contains Term 3, or Term 5, AND Domian is domain1, then in added column, fill "Keywords"

Else, fill "not Keywords"

I tried to write in PQ, but failed:

each if Text.StartsWith([Domian],"domain0") and 
    (Text.Contains([Query], "Term 1") or Text.Contains([Query], "Term 2") )
    then "Keywords" 
    else if 
    each if Text.StartsWith([Domian],"domain1") and 
    (Text.Contains([Query], "Term 3") or Text.Contains([Query], "Term 5") )
    then "Keywords" 
    else "not Keywords")

By the way, what's the difference between "Each if" and "if"? I see each time i use the "Add conditional column", the code comes out with "each if"

Thanks in advance.

H