Perhaps you should try some spelling variations:
evidence syntheses » evidence hypothesis
evidence synopsis » science synopsis, eine synopsis, video synopsis
"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 synopsis))) or (evidence synthesis))") OR ("evidence systems")).
• Removing quotes may allow a broader search: (( ((((evidence syntheses) or (evidence synopsis))) or (evidence synthesis)) ) or ( evidence systems )).
• Adding a wildcard symbol may retrieve word variants: (("((((evidence syntheses) or (evidence synopsis))) or (evidence synthesis))") or ("evidence systems"))*.