Perhaps you should try some spelling variations:
"central city research program a." » "central city research programs a.", "central city research project a.", "central equity research program a.", "central key research program a.", "central my research program a.", "central cities research program a.", "central city research program _."
"central society research program a." » "central society research programs a.", "central society research project a.", "central social research program a.", "central safety research program a.", "central sociology research program a.", "centric society research program a.", "central symmetry research program a.", "central society research program _."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("central city research program a.") OR ("central society research program a."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"central city research program a.\") OR (\"central society research program a.\"))".
• Removing quotes may allow a broader search: (( central city research program a. ) OR ( central society research program a. )).
• Adding a wildcard symbol may retrieve word variants: (("central city research program a.") OR ("central society research program a."))*.