"byli bychom radi kdybys vice pracoval" Can i use "vice"?
urcite. Teda ted uz jo
What is the difference between "víc" and "vice"?
See my new answer to Paul.
I wrote: Bychom byli rádi, kdybyste víc pracovali, and it was wrong. Why?
You shouldn't start a sentence with bychom. It is not a full independent word, but a part of the conditional which cannot be placed everywhere, it behaves as a clitic and therefore follows the second-position rule.
Chapu, thanks. Unfortunately these lessons have no theory section.
Why is ''Kdybys víc pracoval byli bychom rádi'' wrong?
Because it unnecessarily switches the clauses. Don't do that. It is simple to keep the order for you and it is difficult for us to support so many possible answers.
It is not a very natural order anyway.
The exercise page shows the answer as ”...více pracoval”, but this discussion page shows “...víc pracoval”. Are they both correct, and if so, what is the difference between “víc” and “více”?
více is more formal, víc is more colloquial
Now it is a different one, but I believe my answer is right. "Rádi bychom byli kdybys víc pracoval"
I don't believe the screenshot was pasted, but I did it several times
You can only paste a screenshot in your comment using ![description](address).
However, your word order is very strange. Do not start the sentence with rád/ráda. There might be some rare exceptions, but this is not one of them.