Perhaps you should try some spelling variations:
clash » class, flash, crash
smash » slash
sath » sathe, saith, sathi
seath » death, heath, seats, seth, seith, seah
swat » sweat, sat, stat
seat » set, seit, sea
swan » san, span
-plate » -plates, -place

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: ((clash OR smash) OR ((sath OR seath) OR ((swat OR seat) OR swan)))-plate.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((clash or smash) or ((sath or seath) or ((swat OR seat) or swan)))-plate".
• Adding a wildcard symbol may retrieve word variants: ((clash or smash) or ((sath or seath) or ((swat OR seat) or swan)))-plate*.