Perhaps you should try some spelling variations:
"synthesize" » "synthesized", "synthesis", "synthese"
"synthesizeds" » "synthesizedds", "synthesisds", "syntheseds", "synthesized", "synthesizes", "synthesizers"
"synthesiss" » "synthesises", "synthesis", "synthesise"

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