Perhaps you should try some spelling variations:
"synthesizer" » "synthesized", "synthesizes", "synthesizing", "synthesizedr", "synthesisr", "syntheser"
"synthesise" » "synthesises", "synthesised", "synthesis"
"synthesize" » "synthesized", "synthesis", "synthese"
"synthesisd" » "synthesised", "synthesis", "synthesisand"

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