Perhaps you should try some spelling variations:
diplomat » diplomats, diploma, diplomatic
diplomatics » diplomatsics, diplomaics, diplomaticics, diplomatic, diplomats, diplomatie
diplomas » diplomats, diploma, diplomes
diplomacies » diplomatie, diplomacia, diplomates

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: (( diplomat OR ( diplomas OR diplom )) OR (diplomacies OR diplomatics) ).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( diplomat or ( diplomas or diplom )) or (diplomacies OR diplomatics) )".
• Adding a wildcard symbol may retrieve word variants: (( diplomat or ( diplomas or diplom )) or (diplomacies OR diplomatics) )*.