The search box in the lectionary pane appears to not work for finding Bible passages
If you click on 'Monday of the Fifth Week in Ordinary Time' in the Passage Guide, you can note that the range Genesis 1:1-2:3 is not actually in the resource. The range that is in the resource is Genesis 1:1-19.
I did notice that searching for "Gen 1:1-19" doesn't work either, because in the text an extended hyphen is used. Searching with an extended hyphen has the expected results. I have reported this issue to development.
This is expected behavior. The search box in the resource pane works off of exact character matching.