Perhaps you should try some spelling variations:
"health substance network systems report" » "health distance network systems report", "health substrate network systems report", "health resistance network systems report", "health substance network system report", "health substance network systems support", "health substance network systems transport"
"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 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 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 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 report") OR ("health substance network systems recent"))))*.