Because the model page doesn't mention any instructions or trigger words I went into the metadata and training data file and got the idea for how its used. You can chose to get a multiple face poses or a solo face pose.

Required trigger:
views

If you want a face sheet with multiple face poses then prompt one of the following:
character face sheet, multiple views,
differents views, face sheet, woman focus, female
or
character face sheet, multiple views,
differents views, face sheet, male focus, male

If you want a solo face pose then use the following, making sure to add the pose trigger you want from the list further down:
solo, woman focus, female,
or
solo, male focus, male,

Specific Pose triggers:

front view
front down view
front down 2 view
front up 1 view — this one seems to be have an image that is rotated incorrectly in the training data, so it may not work correctly.
front up 2 view
side back right view
side down right view
side right down view
side right down 2 view
side right up view
side right up 2 view
side right view
side up right view
side up 2 view
3-4 right back view
3-4 right down view
3-4 right down 2 view
3-4 right up 1 view
3-4 right up 2 view
3-4 right view
3-4 up right view
3-4 up 2 view

You can check the training data file to match up the view triggers to their correct poses. As stated above, the front up 1 view seems to have a mistake in the training data, specifically for the male one, but I would assume it would ruin both the male and female version of that pose.