Perhaps you should try some spelling variations:
health assistance » health substance, cash assistance
"health guidance network synthesis report" » "health guidance network systems report", "health guide network synthesis report", "health finance network synthesis report", "health impedance network synthesis report", "health evidence network synthesis report", "health substance network synthesis report"
healthy distance » health resistance, healthy districts, health substance
earth distance » search distance, path distance, garch distance

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("health guidance network synthesis report") OR ("((earth distance) or (((healthy distance) OR (health assistance)))) network synthesis report")).
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• Adding a wildcard symbol may retrieve word variants: (("health guidance network synthesis report") or ("((earth distance) or (((healthy distance) OR (health assistance)))) network synthesis report"))*.