Perhaps you should try some spelling variations:
"diplomat" » "diplomats", "diplomatie", "diplom", "diplomt", "diplomatst"
"diplomatic" » "diplomatsic", "diplomatieic", "diplomic", "diplomtic", "diplomatstic"
"diploma" » "diplom", "diplomats"
"diplomacy" » "diplomcy", "diplomatscy"

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