Perhaps you should try some spelling variations:
"diplomat" » "diplomatic", "diplomatie", "diplom", "diplomt"
"diplomats" » "diplomatics", "diplomaties", "diploms", "diplomts", "diplomatic"
"diplomacy" » "diplomcy"
"diploma" » "diplom"
"diplomacys" » "diplomcys", "diplomacies", "diplomas", "diplomacia"

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 "diplomacy") OR "diploma") OR ("diplomats" OR "diplomacys")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((\"diplomat\" OR \"diplomacy\") or \"diploma\") or (\"diplomats\" or \"diplomacys\"))".
• Removing quotes may allow a broader search: ((( diplomat OR diplomacy ) or diploma ) or ( diplomats or diplomacys )).
• Adding a wildcard symbol may retrieve word variants: ((("diplomat" OR "diplomacy") or "diploma") or ("diplomats" or "diplomacys"))*.