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

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 program") OR ("Evidence-acid synthesis program"))) OR ("evidence-based synthesis problems")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Evidence-based synthesis program\") OR (\"Evidence-acid synthesis program\"))) or (\"evidence-based synthesis problems\"))".
• Removing quotes may allow a broader search: (((( Evidence-based synthesis program ) OR ( Evidence-acid synthesis program ))) or ( evidence-based synthesis problems )).
• Adding a wildcard symbol may retrieve word variants: (((("Evidence-based synthesis program") OR ("Evidence-acid synthesis program"))) or ("evidence-based synthesis problems"))*.