You can't. Current transfer ratio is only 500% guaranteed and 1000% typical, which means 5x or 10x more Ic than If.
See figure 4. With If=10mA you only get a few times more Ic than with If=1mA, which would be 10mA typical. You could increase collector current by applying even more than 5V while the optocoupler is turned on but come on.