Try googling “happy u s couples”
Your search parameter is picking up the American from “African American”
It’s a Boolean thing.
Funny thing is that googling happy South American couples actually brings up South Americans. If it is a boolean-thing, it should bring up a mixture instead of only African-Americans.
Why does American equal only African-Americans and not Native Americans, South Americans, North Americans, Italian-Americans, Irish-Americans, etc.? Very curious response for a search engine.