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

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