Usually there is a tile on the tower already. If it's the red one on the side nearest the jump to the other building, then I'm pretty sure that is NORTH. (That's what we found when completing it.)

EDIT:

If you already have EAST then you know the opposite is WEST and the one clockwise between them has to be SOUTH and therefore leaving the other one to be NORTH.

And one more thing. We always find on weird symbol that doesn't look Chinese and there is never another bamboo tile to go with it any idea

Well you don't need to find all the tiles, if you can get most of them then you can narrow the original 24 possibilities down to about 2 or 3 which won't take that long to try if someone keeps a crawler or a zombie training whilst the one with the knuckles hits the posts.

Just get a piece of paper and write a table out with 4 columns. If you're 100% east is second for example, then write E in the second column and put the other wind directions in the columns either side to give you a limited amount of possibilities. Then try the rows youve created as a result. Of course if you're 100% sure on more than 1 then put that in too and you get even less possibilities.

I know that's a lot to read but we spent over an hour on this part of the Easter egg.