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 2 research project synthesis.", "central tax research project synthesis.", "central s.a research project synthesis."
"central de research program stress." » "central de research programs stress.", "central de research program success.", "central de research program synthesis.", "central does research program stress.", "central key research program stress.", "central led research program stress.", "centrale des research program stress.", "central _ research program stress.", "centro de research program stress."

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 de research program stress.") OR ("central a research project synthesis."))~.
• Removing quotes may allow a broader search: (( central de research program stress. ) or ( central a research project synthesis. ))~.
• Adding a wildcard symbol may retrieve word variants: (("central de research program stress.") or ("central a research project synthesis."))*.