Perhaps you should try some spelling variations:
"health dence network synthesis report" » "health dence network systems report", "health dense network synthesis report", "health defence network synthesis report", "health dense networks synthesis report", "health device network synthesis report", "health evidence network synthesis report", "health science network synthesis report"
"health impedance network synthesis report" » "health impedance network systems report", "health importance network synthesis report", "health temperance network synthesis report", "health imperative network synthesis 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"

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 dence network synthesis report") OR ((("health impedance network synthesis report") OR ("head impedance network synthesis report")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"health dence network synthesis report\") or (((\"health impedance network synthesis report\") OR (\"head impedance network synthesis report\"))))".
• Removing quotes may allow a broader search: (( health dence network synthesis report ) or ((( health impedance network synthesis report ) OR ( head impedance network synthesis report )))).
• Adding a wildcard symbol may retrieve word variants: (("health dence network synthesis report") or ((("health impedance network synthesis report") OR ("head impedance network synthesis report"))))*.