Perhaps you should try some spelling variations:
swash » slash
awash » wash, akash, arash
sweath » sheath, sweat, sweats
spath » spat, xpath, spate
smash » slash
sath » sathe, saith, sathi
swath » sweath, swanh, sath
swat » sweat, swan, sat
-plate* » -plates*

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: ((((swash OR awash) OR ((swath OR sweath) OR spath)) OR smash) OR (sath OR swat))(-plate* OR -place*).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((swash or awash) or ((swath or sweath) or spath)) or smash) or (sath or swat))(-plate* OR -place*)".
• Adding a wildcard symbol may retrieve word variants: ((((swash or awash) or ((swath or sweath) or spath)) or smash) or (sath or swat))(-plate* OR -place*)*.