Perhaps you should try some spelling variations:
"health substance network systems recent" » "health distance network systems recent", "health substrate network systems recent", "health resistance network systems recent"
"health evidence network synthesis report" » "health science network synthesis report", "health dence network synthesis report", "health incidence networks synthesis report"
"health guidance network synthesis report" » "health guide network synthesis report", "health finance network synthesis report", "health impedance 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 guidance network synthesis report"))) OR ("health substance network systems recent")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"health evidence network synthesis report\") OR (\"health guidance network synthesis report\"))) or (\"health substance network systems recent\"))".
• Removing quotes may allow a broader search: (((( health evidence network synthesis report ) OR ( health guidance network synthesis report ))) or ( health substance network systems recent )).
• Adding a wildcard symbol may retrieve word variants: (((("health evidence network synthesis report") OR ("health guidance network synthesis report"))) or ("health substance network systems recent"))*.