When typing "united ...", the United States shows up in the list.

When typing "america ..." the United States does not show up in the list.

Yet "United States of America" is the, or one of the official/common names of the United States, according to https://en.wikipedia.org/wiki/United_states and https://www.cia.gov/library/publications/the-world-factbook/...

I like the interface, but it has a few quirks as pointed out in the other comments, and the database behind it could probably use some additions.