Perhaps you should try some spelling variations:
"central basic research program success." » "central basic research programs success.", "central basic research project success.", "central basic research program stress.", "central based research program success.", "central bajio research program success.", "neutral basic research program success.", "central bank research program success."
"central asia research program synthesis." » "central asia research programs synthesis.", "central asia research project synthesis.", "central media research program synthesis.", "central china research program synthesis.", "central a research program synthesis."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("central basic research program success.") or ("central asia research program synthesis."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("central basic research program success.") OR ("central asia research program synthesis.")).
• Removing quotes may allow a broader search: (( central basic research program success. ) or ( central asia research program synthesis. )).
• Adding a wildcard symbol may retrieve word variants: (("central basic research program success.") or ("central asia research program synthesis."))*.