Looking on the internet deeply has found these results:

that we do so is the most popular phrase on the web.

that we do too 13,610,000 results on the web	that we do so 1102,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Again, we have reserved enough money within the budget and it is quite right and proper that we do so. We can take action, and it is important that we do so without further delay. It is only fair that we do so. It is important that we do so, and it is important that we do so as quickly as possible. And I think perhaps it's better that we do so unaccompanied. It is vital that we do so. It is essential that we do so if there is a next round. Our standards and our respect for democracy make it imperative that we do so.

that we do too

13,610,000 results on the web

that we do so

1102,000,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Again, we have reserved enough money within the budget and it is quite right and proper that we do so.
We can take action, and it is important that we do so without further delay.
It is only fair that we do so.
It is important that we do so, and it is important that we do so as quickly as possible.
And I think perhaps it's better that we do so unaccompanied.
It is vital that we do so.
It is essential that we do so if there is a next round.
Our standards and our respect for democracy make it imperative that we do so.