Perhaps you should try some spelling variations:
"impact influence networks synthesis report" » "impact inference networks synthesis report", "impact inference network synthesis report", "impact reference networks synthesis report", "impact influence networks systems report", "impact influence nets synthesis report", "direct influence networks synthesis report", "effect influence networks synthesis report", "might influence networks synthesis report"
"health substance network synthesis report" » "health distance network synthesis report", "health resistance network synthesis report", "health distance networks synthesis report"
"health substrate network synthesis report" » "health subscribe networks synthesis report", "health subscriber network synthesis report", "health state network synthesis report", "earth substrates network synthesis report", "healing substrates network synthesis report"
"health guidance network systems recent" » "health guide network systems recent", "health finance network systems recent", "health impedance network systems recent", "health evidence network systems recent"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("impact influence networks synthesis report") OR ((((("health substance network synthesis report") OR ("health substrate network synthesis report"))) OR ("health guidance network systems recent")))).
• Removing quotes may allow a broader search: (( impact influence networks synthesis report ) or ((((( health substance network synthesis report ) or ( health substrate network synthesis report ))) or ( health guidance network systems recent )))).
• Adding a wildcard symbol may retrieve word variants: (("impact influence networks synthesis report") or ((((("health substance network synthesis report") or ("health substrate network synthesis report"))) or ("health guidance network systems recent"))))*.