Perhaps you should try some spelling variations:
"central action research program stress." » "central action research programs stress.", "central national research program stress.", "central section research program stress.", "central nation research program stress.", "centric action research program stress.", "central action research program success.", "central action research program synthesis."
"central basic research project success." » "central based research project success.", "central asia research project success.", "central bajio research project success.", "neutral basic research project success.", "central basic research projects success."

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