Perhaps you should try some spelling variations:
"central basic research program success." » "central basic research programs success.", "central basic research project success.", "central bank research program success.", "central asia research program success.", "central banks research program success."
"central city research program stress." » "central city research programs stress.", "central city research project stress.", "central city research program synthesis.", "central society research program stress.", "central equity research program stress.", "central cgiar research program stress.", "central cities research program stress."

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