sở dĩ

Từ điển Việt Anh (Vietnamese English Dictionary)

	[sở dĩ]
		if..., it is because...
			Sở dĩ họ từ chối là vì họ bận quá
			If they refused, it was because they were very busy.
			Sở dĩ bà ấy không đến là chỉ vì bà ấy bệnh
			The reason she didn't come was simply that she was ill

If, that is why
Sở dĩ họ từ chối là vị họ bận quá If they refused, it was because they were very busy