1.
in relation to
I have some comments to make in relation to this matter. It's brain is small in relaton to its body.
This letter from the bank is in relation to your mortgage.
in relation to the advertisement
英語 "という言葉in Bezug auf"(in relation to)集合で発生します。
Customer Care (vocabulary) - Kundenservice (Wortsc...2.
with regards
3.
pertaining
A reward has been offered for information pertaining to the incident.