Later, the Patterson's whipped a cross to the back post was aimed at Lewis but the attacking midfielder couldn't quite reach it at full stretch before it was Lewis who was denied again in stoppage time, his header turned aside by Iaruel.
But, growing in confidence as the half wore on, Vanuatu also had sights of the New Zealand goal and Max Cromcombe was forced into a punching save when Jean Kaltack's powerful header from a corner was straight at the Oxford United 'keeper. The ball was returned quickly into the area where it was flicked narrowly wide.
But early in the second half the New Zealand side made the important breakthrough as Patterson turned home from close range two minutes after the restart in the aftermath of a corner which was returned into the six-yard area by Sam Brotherton.
Almost 10 minutes later Tuiloma doubled the lead with a well-taken header at the near post from corner.
From that point Hudson's team were clinical in closing out the result to book their final berth, keeping their fourth straight clean sheet of the tournament in the process.