Perhaps you should try some spelling variations:
networks synthesis » networks systems, nets synthesis
"health substance network systems report" » "health distance network systems report", "health substrate network systems report", "health resistance network systems report", "health substance network system report", "health substance network systems support", "health substance network systems recent"
"health evidence network synthesis report" » "health science network synthesis report", "health dence network synthesis report", "health incidence networks synthesis report"
health incidence » death incidence, health science, path incidence
"health guidance network systems report" » "health guide network systems report", "health finance network systems report", "health impedance network systems report", "health guidance network system report", "health guidance network systems support", "health guidance network systems recent"
health incident » health including

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