18:17 Nov 6, 2011 

This is clearly pretty poorly written, I suspect by someone who is not a native EN speaker (well, unless educational standards really have plummeted that far since I worked in education in the UK!)

I would guess that the intended meaning was simply "(getting them) to place their trust in you".

17:53 Nov 6, 2011 

Talk directly to as many of them as possible in a generous way –this creates trust in the benefit of listening.

Do not talk at them -this is aggressive and likely to make them look for the exits.

Audience control comes of them trusting themselves to you.

This is all I can add otherwise I would have to write the whole document.

Thank you all for you help.

17:44 Nov 6, 2011 

Well, being myself GB, I was kind of hoping this was perhaps just odd US English ;-) Oh dear, sounds more like mid-Atlantic illiteracy :-(

17:11 Nov 6, 2011 

As a matter of fact, the whole document is weirdly written and by checking the customer's Website I see that he's British. I am not sure if it has anything to do with that fact but I will verify with him if I don't find a satisfactory answer.

17:04 Nov 6, 2011 

Is it just me, or is this EN slightly odd? I'd have expected either "them trusting you" (as translated by Antoine) or else "them entrusting themselves to you", which sounds slightly weird, as if they are in some way 'placing their life in their hands'; the presence of that "themselves" may be crucial in correctly conveying the intended meaning — which you probably ought to check with the customer!