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

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