Perhaps you should try some spelling variations:
"synthesizes" » "synthesis", "syntheses", "synthesizing", "synthesiss"
"synthesiss" » "synthesises", "synthesis", "synthesise"
"synthesize" » "synthesis", "synthese"
"synthesized" » "synthesisd", "synthesed"

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: ((("synthesizes" OR "synthesiss") OR "synthesize") OR "synthesized").
• Removing quotes may allow a broader search: ((( synthesizes or synthesiss ) or synthesize ) or synthesized ).
• Adding a wildcard symbol may retrieve word variants: ((("synthesizes" or "synthesiss") or "synthesize") or "synthesized")*.