Perhaps you should try some spelling variations:
"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"
"health substance network synthesis report" » "health substance network systems report", "health substrate network synthesis report", "health resistance network synthesis report", "health distance networks synthesis report"
"health distance network synthesis report" » "health distance network systems report", "health distance networks synthesis report", "health resistance network synthesis report", "health disease network synthesis report", "healthy distance network synthesis report", "earth distance network synthesis report", "health assistance network synthesis report"

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 substance network synthesis report") OR ("health distance network synthesis report")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"health evidence network synthesis report\") or (((\"health substance network synthesis report\") OR (\"health distance network synthesis report\"))))".
• Removing quotes may allow a broader search: (( health evidence network synthesis report ) or ((( health substance network synthesis report ) OR ( health distance network synthesis report )))).
• Adding a wildcard symbol may retrieve word variants: (("health evidence network synthesis report") or ((("health substance network synthesis report") OR ("health distance network synthesis report"))))*.