I'm going of memory so it may be slightly off, but move the white unit on the right side to the left of the other white ones to form a diamond with the white units, then move one of the yellow units on the right side below the right priestess, now delete the unit between all the whites and it'll fuse the knight and right priestess and you should have 3 turns left to move the remaining units.
There's a yelow unit with a white above, below and to the right of it, all you do is get the white unit that isn't one of these and add it to the left of this unit, then you grab a yellow to the right of the right priestess and add it to the south east side of the yellow surrounded by the whites, now delete this famous yellow that's between the whites, simple from there.
I may be slightly mistaken about which yellow to move, I'm pretty sure the whites are correct though.
What happens is when you delete the central yellow, the southern white moves up in its place creating a wall whilst linking with the knight (Grants 2 extra moves) and the yelow to the south east will also fall down and link the priestess (Grants 1 extra move).
If it still doesn't work then post the layout of the units.
^^ Just read your reply after typing it up, so I may as well post, it's not the easiest thing to understand so additional info may help.