Perhaps you should try some spelling variations:
"health evidence network synthesis report" » "health guidance network synthesis report", "health dence network synthesis report", "health incidence networks synthesis report"
"health science network systems recent" » "health sciences network systems recent", "health science networks systems recent", "health science work systems recent"
"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"

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