1920 census lookup pls

Hi
I"m searching for
James Joseph FLOOD b 1875 New Jersey
Margaret (Maggie) Maloney Flood b 1875 New York

they should be listed with their daughters all born in NJ
Mary b 1898
Helen b 1900
Margarite b 1903

also listed may be their nieces/adopted daughters

Alice b 1904
Florence b 1911

They are the natural daughters of William and Sarah (Sadie) Flood

Both Flood families are listed in the 1910 census in Cliffside Park,
Bergen, New Jersey  only the James Flood family is listed in 1930 also
in Cliffside Park.  I can find neither family in 1920 and am trying to
narrow down when William and Sarah died and their daughters joined the
James flood family.  I have no reason to believe they ever left Bergen
County but for the life of me I can't seem to find them

Thank You
Karen