Perhaps you should try some spelling variations:
prevost de » prevost des, prevot des, prevost _
post des » poste des, kost des, post de
des gard » des garde, des gardes, des garns
de grand » de grande, de grands, de grandi

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: (( post des gard ) OR ( prevost de grand )).
• Adding a wildcard symbol may retrieve word variants: (( post des gard ) or ( prevost de grand ))*.