Perhaps you should try some spelling variations:
health assistance » health substance, cash assistance
"health evidence network synthesis report" » "health science network synthesis report", "health guidance network synthesis report", "health dence network synthesis report"
health distance » healthy distance, earth distance, health resistance
systems support » system support, systems supporting, system supporting

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 distance) OR (health assistance)) network systems support")).
• Removing quotes may allow a broader search: (( health evidence network synthesis report ) or ( ((health distance) OR (health assistance)) network systems support )).
• Adding a wildcard symbol may retrieve word variants: (("health evidence network synthesis report") or ("((health distance) OR (health assistance)) network systems support"))*.