Perhaps you should try some spelling variations:
"christian historical school" » "russian historical school", "christology historical school", "christian theological school", "christian historical sociology"
"christian history school" » "christianity history school", "christ history school", "christian oratory school"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"christian historical school\") OR (\"christian history school\"))".
• Removing quotes may allow a broader search: (( christian historical school ) OR ( christian history school )).
• Adding a wildcard symbol may retrieve word variants: (("christian historical school") OR ("christian history school"))*.