Perhaps you should try some spelling variations:
"health imperative network synthesis report" » "health iterative network synthesis report", "health operative network synthesis report", "health interactive network synthesis report", "health comparative network synthesis report", "health integrative network synthesis report", "health ulcerative network synthesis report", "health imperative network systems report"
"head impedance network synthesis report" » "head impedance network systems report", "head impedances network synthesis report", "load impedance network synthesis report", "end impedance network synthesis report"
"health science walk synthesis report" » "health sciences walk synthesis report", "health science wall synthesis report", "health science mask synthesis report", "health science work synthesis report", "health sciences wals synthesis report", "health science talks synthesis report"

Try widening your search to All Fields.

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: (("health science walk synthesis report") OR ((("health imperative network synthesis report") OR ("head impedance network synthesis report")))).
• Removing quotes may allow a broader search: (( health science walk synthesis report ) or ((( health imperative network synthesis report ) or ( head impedance network synthesis report )))).
• Adding a wildcard symbol may retrieve word variants: (("health science walk synthesis report") or ((("health imperative network synthesis report") or ("head impedance network synthesis report"))))*.