How can I open that darned door?

Hint 1 of 9:

If you just stand there, the thieves will kill you.

Hint 2 of 9:

You're going to have to keep them from seeing you.

Hint 3 of 9:

See anything about the height of a man?

Hint 4 of 9:

You can hide from the thieves behind the rocks at the small oasis.