Perhaps you should try some spelling variations:
evidence syntheses » evidence hypothesis, evidence synopsis
"evidence synthese" » "evidence scheme", "evidence sentence", "evidence southern"
evidence systems » science systems, valence systems, reference systems

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: (("((((((evidence syntheses) or (evidence systems))) or (video synopsis))) or (evidence synthesis))") OR ("evidence synthese")).
• Removing quotes may allow a broader search: (( ((((((evidence syntheses) or (evidence systems))) or (video synopsis))) or (evidence synthesis)) ) or ( evidence synthese )).
• Adding a wildcard symbol may retrieve word variants: (("((((((evidence syntheses) or (evidence systems))) or (video synopsis))) or (evidence synthesis))") or ("evidence synthese"))*.