The words "diversity", "equity" and "inclusion" seem to be blocked from NIH website's search function

A couple of things I tried... Please validate to tell me I'm not crazy. Searches done on www.nih.gov (linked in post).

These are blocked:

• "diversity"
• "diversity "
• "equity"
• "inclusion"
• "DEI"

These are not blocked:

• "diverse"
• "diversit"
• "diversity*", "inclusion*", "equity*"
• "diversitya"
• "equity and diversity"
• "diversity and equity"
• "diversity equity inclusion"

What is the meaning of this