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

Try widening your search to All Fields.

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 ((("evidence synthese") OR ("evidence sentence")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"((evidence syntheses) or (evidence systems))\") or (((\"evidence synthese\") OR (\"evidence sentence\"))))".
• Removing quotes may allow a broader search: (( ((evidence syntheses) or (evidence systems)) ) or ((( evidence synthese ) OR ( evidence sentence )))).
• Adding a wildcard symbol may retrieve word variants: (("((evidence syntheses) or (evidence systems))") or ((("evidence synthese") OR ("evidence sentence"))))*.