Perhaps you should try some spelling variations:
"health substance network synthesis report" » "health distance network synthesis report", "health substrate network synthesis report", "health resistance network synthesis report"
"health evidence network systems report" » "health science network systems report", "health dence network systems report", "health incidence networks systems report", "health evidence network system report", "health evidence network systems support", "health evidence network systems recent"
"health guidance network systems report" » "health guide network systems report", "health finance network systems report", "health impedance network systems report", "health guidance network system report", "health guidance network systems support", "health guidance network systems recent"

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