Perhaps you should try some spelling variations:
"health guided network systems report" » "health guided network system report", "health guided network systems support", "health guided network systems transport", "health guide network systems report", "hath guided network systems report", "health guido network systems report"
"head impedance network synthesis report" » "head impedances network synthesis report", "load impedance network synthesis report", "end impedance network synthesis report"
"health dense network systems recent" » "healthy sense network systems recent", "health disease network systems recent", "health device network 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 guided network systems report") OR ("health dense network systems recent"))) OR ("head impedance network synthesis report")).
• Removing quotes may allow a broader search: (((( health guided network systems report ) or ( health dense network systems recent ))) or ( head impedance network synthesis report )).
• Adding a wildcard symbol may retrieve word variants: (((("health guided network systems report") or ("health dense network systems recent"))) or ("head impedance network synthesis report"))*.