Perhaps you should try some spelling variations:
"diploma" » "diplom", "diplomacy"
"diplomats" » "diplomts", "diplomacyts", "diplomacy"
"diplomatic" » "diplomtic", "diplomacytic"
"diplomacyic" » "diplomcyic", "diplomacycyic", "diplomacy", "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: ("diploma" OR (("diplomats" OR "diplomatic") OR "diplomacyic"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(\"diploma\" or ((\"diplomats\" OR \"diplomatic\") or \"diplomacyic\"))*".
• Removing quotes may allow a broader search: ( diploma or (( diplomats OR diplomatic ) or diplomacyic ))*.