Perhaps you should try some spelling variations:
"central a research project synthesis." » "central a research protein synthesis.", "central a research program synthesis.", "central a research policy synthesis.", "central la research project synthesis.", "central _ research project synthesis.", "central 1 research project synthesis."
"central 2 research program sri." » "central 2 research programs sri.", "central 2 research program sct.", "central 2 research program sig.", "central 2 research program sme.", "central _ research program sri.", "central 1 research program sri.", "central 7 research program sri."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("central 2 research program sri.") OR ("central a research project synthesis."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"central 2 research program sri.\") OR (\"central a research project synthesis.\"))*".
• Removing quotes may allow a broader search: (( central 2 research program sri. ) OR ( central a research project synthesis. ))*.