Perhaps you should try some spelling variations:
"synthesizer" » "synthesized", "synthesizes", "synthesizing", "synthesizedr", "synthesisr", "syntheser"
"synthesisr" » "synthesiser", "synthesis", "synthesise"
"synthesize" » "synthesized", "synthesis", "synthese"
"synthesed" » "synthese", "syntheses", "synthesen"

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: ((("synthesizer" OR "synthesisr") OR "synthesize") OR "synthesed").
• Removing quotes may allow a broader search: ((( synthesizer or synthesisr ) or synthesize ) or synthesed ).
• Adding a wildcard symbol may retrieve word variants: ((("synthesizer" or "synthesisr") or "synthesize") or "synthesed")*.