I don't think the Orb looks at partial matches so landfall as one word will show up and land will only show up if it is only by itself.
No what I'm saying is the actual text of the ability has the word land in it. for example adventuring gear reads,
Landfall — Whenever a land enters the battlefield under your control, equipped creature gets +2/+2 until end of turn.
So landfall shows up 16 times in the orb and most likely there will be at least 16 instances of land from the landfall text. There could be more if some odd wording takes place or maybe landfall that does something extra with a particular land type but almost certainly landfall will take up at least 16 instances of the word land.
Edit: really sarnathed in this super active thread.