Perhaps you should try some spelling variations:
"christian directory union" » "christian directory using", "christian directory und", "christian direct union"
"christianity history union" » "christianity history unix", "christianity history units", "christianity history upon"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("christianity history union") OR ("christian directory union")).
• Removing quotes may allow a broader search: (( christianity history union ) or ( christian directory union )).
• Adding a wildcard symbol may retrieve word variants: (("christianity history union") or ("christian directory union"))*.