Perhaps you should try some spelling variations:
"health evidence network synthesis report" » "health science network synthesis report", "health guidance network synthesis report", "health dence network synthesis report"
"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 devices » health device, health services, health service
health dence » health device, health science, 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 evidence network synthesis report") OR ("((health dence) or (health devices)) 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 evidence network synthesis report\") or (\"((health dence) or (health devices)) network synthesis report\"))) or (((\"health impedance network systems report\") OR (\"health impedance network systems recent\"))))".
• Removing quotes may allow a broader search: (((( health evidence network synthesis report ) or ( ((health dence) or (health devices)) network synthesis report ))) or ((( health impedance network systems report ) OR ( health impedance network systems recent )))).
• Adding a wildcard symbol may retrieve word variants: (((("health evidence network synthesis report") or ("((health dence) or (health devices)) network synthesis report"))) or ((("health impedance network systems report") OR ("health impedance network systems recent"))))*.