Perhaps you should try some spelling variations:
"health influence networks synthesis report" » "health inference networks synthesis report", "health inference network synthesis report", "health reference networks synthesis report", "health influence networks systems report", "health influence nets synthesis report", "heart influence networks synthesis report", "death influence networks synthesis report", "earth influence networks synthesis report"
"health guidance network synthesis report" » "health finance network synthesis report", "health impedance network synthesis report", "health guided network synthesis report", "health evidence network synthesis report", "health substance network synthesis report"
health science » health sciences
"health guide network systems report" » "health guide network system report", "health guide network systems support", "health guide network systems recent", "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 synthesis report" » "health guided network synthesis report", "health side network synthesis report", "health wide network synthesis report", "health guido network synthesis report", "earth guide network synthesis report", "health grid network synthesis report"
health dence » health device, health evidence, health devices

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("health influence networks synthesis report") OR ("((health dence) or (health science)) network synthesis report"))) OR ((("health guidance network synthesis report") OR ((("health guide network synthesis report") OR ("health guide network systems report")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"health influence networks synthesis report\") or (\"((health dence) or (health science)) network synthesis report\"))) or (((\"health guidance network synthesis report\") or (((\"health guide network synthesis report\") OR (\"health guide network systems report\"))))))".
• Removing quotes may allow a broader search: (((( health influence networks synthesis report ) or ( ((health dence) or (health science)) network synthesis report ))) or ((( health guidance network synthesis report ) or ((( health guide network synthesis report ) OR ( health guide network systems report )))))).
• Adding a wildcard symbol may retrieve word variants: (((("health influence networks synthesis report") or ("((health dence) or (health science)) network synthesis report"))) or ((("health guidance network synthesis report") or ((("health guide network synthesis report") OR ("health guide network systems report"))))))*.