bro just pull down on the pluger and wait it will slowly fill....it does not just go in quickly....i use 23g and i pll back sometimes all the way and you can see it comming in slowly and just wait it will eventually fill
fill the syringe with air and shoot it into the vial through the stopper a few times this should somewhat "pressurize" the vial or at least lessen the vacuum created by extracting the liquid.
Cheers