Perhaps you should try some spelling variations:
"synthesisr" » "synthesis", "synthesise", "synthesisers"
"synthesisdr" » "synthesisers", "synthesis", "synthesizer"
"synthesiser" » "synthesisers", "synthesizer", "synthesises"
"synthesize" » "synthesized", "synthesis", "synthese"

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 ("synthesisdr" OR "synthesiser")) OR "synthesize").
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"synthesisr\" or (\"synthesisdr\" OR \"synthesiser\")) or \"synthesize\")".
• Removing quotes may allow a broader search: (( synthesisr or ( synthesisdr OR synthesiser )) or synthesize ).
• Adding a wildcard symbol may retrieve word variants: (("synthesisr" or ("synthesisdr" OR "synthesiser")) or "synthesize")*.