Consider using terms that are contemporary within the time period that you are searching.
Abledness, Ableism, Ableist, Able-bodied, Able-bodiedness
Access, Accessible, Accessibility
Ageism, Ageist, Aging
Deaf, Deafness, Deaf studies
Disability, Disabilities, "Disability studies," "Disability rights," Disabled
Inclusion, Inclusiveness, Inclusivity
Normalcy, Normals, Normative