Perhaps you should try some spelling variations:
"health guidance network synthesis report" » "health guide network synthesis report", "health finance network synthesis report", "health impedance network synthesis report", "health substance network synthesis report"
"health guidance network systems report" » "health guide network systems report", "health finance network systems report", "health impedance network systems report", "health substance network systems report", "health guidance network system report", "health guidance network systems support", "health guidance network systems recent"
"health evidence network synthesis report" » "health science network synthesis report", "health dence network synthesis report", "health incidence networks synthesis report"
health devices » health services, health service, health advice
health device » health service, health services

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