Perhaps you should try some spelling variations:
"health evidence network synthesis report" » "health science network synthesis report", "health dence network synthesis report", "health incidence networks synthesis report"
"health guidance network synthesis report" » "health guide network synthesis report", "health finance network synthesis report", "health guided network synthesis report", "health substance network synthesis report"
"health impedance network systems recent" » "health importance network systems recent", "health temperance network systems recent", "head impedance network systems recent"
"Health impedance network systems support" » "Health impedance network system support", "Health impedance network systems supporting", "Health impedance network system supporting"
"Health impedance network systems report" » "Health impedance network system report", "Health impedance network systems transport"

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 guidance network synthesis report") OR ((((("Health impedance network systems report") OR ("Health impedance network systems support"))) 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 guidance network synthesis report\") or (((((\"Health impedance network systems report\") OR (\"Health impedance network systems support\"))) or (\"health impedance network systems recent\"))))))".
• Removing quotes may allow a broader search: (( health evidence network synthesis report ) or ((( health guidance network synthesis report ) or ((((( Health impedance network systems report ) OR ( Health impedance network systems support ))) or ( health impedance network systems recent )))))).
• Adding a wildcard symbol may retrieve word variants: (("health evidence network synthesis report") or ((("health guidance network synthesis report") or ((((("Health impedance network systems report") OR ("Health impedance network systems support"))) or ("health impedance network systems recent"))))))*.