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

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 "diploma") OR ("diplomats" OR ("diplomacies" OR "diplomacy"))).
• Removing quotes may allow a broader search: (( diplomat or diploma ) or ( diplomats or ( diplomacies or diplomacy ))).
• Adding a wildcard symbol may retrieve word variants: (("diplomat" or "diploma") or ("diplomats" or ("diplomacies" or "diplomacy")))*.