Perhaps you should try some spelling variations:
"slave revolt" » "llave revolt", "save revolt", "suave revolt", "slave revolta", "slave revolu", "slave revolut", "slave revelt", "slave resolt"
"clave revolt" » "clave revolta", "clave revolu", "clave revolut", "clave revelt", "clave resolt"
"clave revol" » "clave revolu", "clave revel", "clave resol"
"clave revuelta" » "clave revueltas", "clave vuelta", "clave revela"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"slave revolt\") OR (((((\"clave revolt\") OR (\"clave revol\"))) OR (\"clave revuelta\"))))~".
• Removing quotes may allow a broader search: (( slave revolt ) OR ((((( clave revolt ) OR ( clave revol ))) OR ( clave revuelta ))))~.
• Adding a wildcard symbol may retrieve word variants: (("slave revolt") OR ((((("clave revolt") OR ("clave revol"))) OR ("clave revuelta"))))*.