I always use ITN to search flights since it shows sub-classes (YBHVML...)

I tried it today and it seems keep ingoring some flights.

e.g. For the two CX HKG-LAX flight, it only show one no matter how I set my searching setting but come up some strange connection flights.

It just doesn't show a particular airline with a particular route...

Is the ITN will not show any flight with F0 or it is just some error?

ANy suggestion of other websites can do the same kind of sub-class search?

Thanks!