Hi Maureen ...
The two marriages that I gave you in my last post (plus those for MIDWINTER and SOMERBY) are the only William HAN(D)COCK(E)/Mary marriages in the county in the second half of the 1700s (taken from the OFHS's complete Oxfordshire Marriage Index, compiled from all available parish records - they have no other records to consult).
The only parishes *not* included in the OMI are those parishes previously in North Berkshire which were transferred to Oxfordshire in the early 1970s when changes were made to the county boundaries. This database (like their Baptism Index) is not publicly available - yet - but for a small fee they will do look-ups.
In view of the above, you won't find any further possible marriages for William and Mary in the "original" Oxfordshire parishes.
Penny