Perhaps you should try some spelling variations:
"oxford early christian duty / oxford early christian duty" » "oxford early christian's duty / oxford early christian's duty"
"oxford every christian duty / oxford every christian duty" » "oxford every christian's duty / oxford every christian's duty", "oxford never christian duty / oxford never christian duty", "afford every christian duty / afford every christian duty", "oxford clergy christian duty / oxford clergy christian duty"

Try widening your search to All Fields.

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: "((\"oxford early christian duty / oxford early christian duty\") OR (\"oxford every christian duty / oxford every christian duty\"))".
• Removing quotes may allow a broader search: (( oxford early christian duty / oxford early christian duty ) OR ( oxford every christian duty / oxford every christian duty )).
• Adding a wildcard symbol may retrieve word variants: (("oxford early christian duty / oxford early christian duty") OR ("oxford every christian duty / oxford every christian duty"))*.