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 system report" » "health distance network system report", "health resistance network system report", "health distance networks system report", "health substance network systems report", "health substance networked systems report", "health substance network system reform", "health substance network system support", "health substance network system recent"
"health substrate network system report" » "health subscribe networks system report", "health subscriber network system report", "health state network system report", "earth substrates network system report", "healing substrates network system report", "health substrate network systems report", "health substrate networked systems report", "health substrate network system reform", "health substrate network system support", "health substrate network system recent"

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