I’m not related to any member of this family.
1940 is the last available census at this time.
No, it's not strange at all.
The time period you are seeking information for is too recent.
Many state have restrictions on access to birth & death records. Restrictions are for privacy as well as stopping ID-theft.
You will need to know the daughter's married name.
DO NOT SEARCH FOR A MARRIED WOMAN USING HER MAIDEN NAME.
The children may be living.
Many ppl don't want an obit published.
TRY - Find a grave – FREE SITE - volunteer site all states; frequently has headstone pic
DO NOT SEARCH FOR A MARRIED WOMAN USING HER MAIDEN NAME.http://www.worldvitalrecords.com/
Try Vital Records – Birth, Marriage, & Death, Social Security Info., Census Records – FREE ALL STATEShttp://search.labs.familysearch.org/