Perhaps you should try some spelling variations:
healthy districts » health districts
"health evidence network synthesis report" » "health evidence network systems report", "health science network synthesis report", "health guidance network synthesis report", "health dence network synthesis report"
healthy distance » health assistance, health resistance, healthy dietary
earth distance » search distance, path distance, garch distance

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 ("((earth distance) or (((((healthy distance) OR (health substance))) or (((healthy districts) or (health district)))))) network synthesis report")).
• Removing quotes may allow a broader search: (( health evidence network synthesis report ) or ( ((earth distance) or (((((healthy distance) OR (health substance))) or (((healthy districts) or (health district)))))) network synthesis report )).
• Adding a wildcard symbol may retrieve word variants: (("health evidence network synthesis report") or ("((earth distance) or (((((healthy distance) OR (health substance))) or (((healthy districts) or (health district)))))) network synthesis report"))*.