go to great lengths (to do something)
To put in a lot of effort, energy, or work to achieve something. We went to great lengths to ensure that this film was historically accurate. I appreciate that the tutor went to great lengths to make sure I understood the assignment
go to great lengths (to do something)
and go to any lengths (to do something)to work very hard to accomplish something; to expend great efforts in trying to do something. I went to great lengths to explain to him that he was not in any trouble.
go to any, great, etc. ˈlengths (to do something)
try very hard (to do something); do whatever is necessary: She went to great lengths to find this book.They were prepared to go to any lengths to help their son.