Perhaps you should try some spelling variations:
"central a research project synthesis." » "central a research program synthesis.", "central a research prosperity synthesis.", "central _ research project synthesis.", "central tax research project synthesis.", "central s.a research project synthesis."
"central 2 research program stress." » "central 2 research programs stress.", "central 2 research program success.", "central 2 research program synthesis.", "central _ research program stress.", "central de 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 2 research program stress.") or ("central a research project synthesis."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("central 2 research program stress.") OR ("central a research project synthesis."))*.
• Removing quotes may allow a broader search: (( central 2 research program stress. ) or ( central a research project synthesis. ))*.