Perhaps you should try some spelling variations:
"slave revol" » "slave revolu", "slave revel", "slave evol"
"slave revolta" » "slave revoluta", "slave revelta", "slave evolta", "slave rivolta", "slave revuelta", "slave travolta", "slave revolua"
"save revolt" » "save revolut", "save revelt", "save evolt", "save revolu"
"save revolte" » "save revolute", "save revelte", "save evolte", "save revolue", "save revolver", "save revolves"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("slave revol") OR ("slave revolta"))) OR ((("save revolt") OR ("save revolte"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"slave revol\") OR (\"slave revolta\"))) OR (((\"save revolt\") OR (\"save revolte\"))))".
• Removing quotes may allow a broader search: (((( slave revol ) OR ( slave revolta ))) OR ((( save revolt ) OR ( save revolte )))).
• Adding a wildcard symbol may retrieve word variants: (((("slave revol") OR ("slave revolta"))) OR ((("save revolt") OR ("save revolte"))))*.