Perhaps you should try some spelling variations:
"synthesisr" » "synthesiser", "synthesis", "synthesise"
"synthesize" » "synthesized", "synthesis", "synthese"
"synthesisd" » "synthesised", "synthesis", "synthesise"
"synthesises" » "synthesizes", "synthesis", "synthesized"

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