MAX(VLOOKUP(A8,Sheet1!B2:E12,4,FALSE),VLOOKUP(A8,S heet1!B2:E12,3,FALSE))

this works fine, but when I try to enter (ctl+shift+enter) the same formula
using the large function, I get an error

LARGE((VLOOKUP(A8,Sheet1!B2:E12,4,FALSE),VLOOKUP(A 8,Sheet1!B2:E12,3,FALSE)),1)

Can vlookup not be nested within large? There is no particular reason I
wanted to use LARGE, I wanted to try it and cannot make it work.

Thanks for your help