Perhaps you should try some spelling variations:
"central basic research project epi." » "central based research project epi.", "central asia research project epi.", "central bajio research project epi.", "neutral basic research project epi.", "central basic research project ep.", "central basic research project e.", "central basic research project ed."
"central food research project nvirp." » "central field research project nvirp.", "central food research project nrip.", "central blood research project nvirp.", "central fund research project nvirp.", "central funds research project nvirp."

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: (("central food research project nvirp.") OR ("central basic research project epi."))~.
• Removing quotes may allow a broader search: (( central food research project nvirp. ) or ( central basic research project epi. ))~.
• Adding a wildcard symbol may retrieve word variants: (("central food research project nvirp.") or ("central basic research project epi."))*.