Perhaps you should try some spelling variations:
networks synthesis » networks systems, nets synthesis
"health evidence network synthesis report" » "health science network synthesis report", "health dence network synthesis report", "health incidence networks synthesis report"
health incidence » health science, path incidence, health insurance
"health guidance network synthesis report" » "health finance network synthesis report", "health impedance network synthesis report", "health guided network synthesis report", "health substance network synthesis report"
death incidence » disease incidence, growth incidence, dengue incidence
health incident » health including
"health guide network systems report" » "health guide network systems support", "health guide network systems recent", "health guide network systems transport", "health guide networked systemss report", "health guided network systems report", "health side network systems report", "health wide network systems report", "health guido network systems report", "earth guide network systems report", "health grid network systems report"
"health guide network system report" » "health guide networked systems report", "health guided network system report", "health side network system report", "health wide network system report", "health guide network system reform", "health guide network system support", "health guide network system recent", "health guido network system report", "earth guide network system report", "health grid network system 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 incidence) or (death incidence))) or (health incident)) networks synthesis report"))) OR ((("health guidance network synthesis report") OR ((("health guide network systems report") OR ("health guide network system report")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"health evidence network synthesis report\") or (\"((((health incidence) or (death incidence))) or (health incident)) networks synthesis report\"))) or (((\"health guidance network synthesis report\") or (((\"health guide network systems report\") OR (\"health guide network system report\"))))))".
• Removing quotes may allow a broader search: (((( health evidence network synthesis report ) or ( ((((health incidence) or (death incidence))) or (health incident)) networks synthesis report ))) or ((( health guidance network synthesis report ) or ((( health guide network systems report ) OR ( health guide network system report )))))).
• Adding a wildcard symbol may retrieve word variants: (((("health evidence network synthesis report") or ("((((health incidence) or (death incidence))) or (health incident)) networks synthesis report"))) or ((("health guidance network synthesis report") or ((("health guide network systems report") OR ("health guide network system report"))))))*.