Perhaps you should try some spelling variations:
"Evidence-based synthesis process" » "Evidence-based synthesis processing", "Evidence-based synthesis problems", "Evidence-based synthesis problem"
"evidence-acid synthesis program" » "evidence-acid synthesis problem", "evidence-acid synthesis problems"

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-based synthesis process") OR ("evidence-acid synthesis program")).
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• Adding a wildcard symbol may retrieve word variants: (("Evidence-based synthesis process") or ("evidence-acid synthesis program"))*.