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 systems support", "health science network systems transport", "health science networked systemss report"
"health science network systems recent" » "health sciences network systems recent", "health science networks systems recent", "health science work systems recent", "health science networked systemss recent"
"health dence network system report" » "health dence networked systems report", "health dense network system report", "health defence network system report", "health dense networks system report", "health dence network system reform", "health dence network system support", "health dence network system recent", "health device network system report", "health evidence network system report", "health devices network system 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 science network systems report") OR ("health science network systems recent"))) OR ("health dence network system report"))) OR ("health impedance network synthesis report")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"health science network systems report\") OR (\"health science network systems recent\"))) or (\"health dence network system report\"))) or (\"health impedance network synthesis report\"))".
• Removing quotes may allow a broader search: (((((( health science network systems report ) OR ( health science network systems recent ))) or ( health dence network system report ))) or ( health impedance network synthesis report )).
• Adding a wildcard symbol may retrieve word variants: (((((("health science network systems report") OR ("health science network systems recent"))) or ("health dence network system report"))) or ("health impedance network synthesis report"))*.