Be sure to look at each & every family on a census page. You never know who is living down the page or even next door.
Missing a daughter? Watch for other females with the same given name living nearby. When you find them use local marriage records to confirm the relationships.
Many times when I find someone in my direct line in a township I go line by line thru the township (unless its hundreds of pages) and see who can find that might possibly be lurking there as welll.
You'll be surprised at what you find.