Perhaps you should try some spelling variations:
"health impedance network synthesis report" » "health importance network synthesis report", "health temperance network synthesis report", "head impedance network synthesis report"
"health science network systems report" » "health sciences network systems report", "health science networks systems report", "health science work systems report", "health science network system report", "health science network systems support", "health science network systems transport"
"health dence networked systems recent" » "health debc networked systems recent", "health dence network systems recent", "health space networked systems recent", "health device networked systems recent", "health evidence networked systems recent", "health devices networked systems recent"

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