Perhaps you should try some spelling variations:
"health evidence network systems report" » "health evidence networks systems report"
"health devices network systems report" » "health devices networks systems report"
"health substance network synthesis report" » "health substance networks synthesis report"
"health assistance networked synthesis report" » "health assistance networksed synthesis report", "health resistance networked synthesis report", "health assistance networks synthesis report"

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 devices network systems report"))) OR ((("health substance network synthesis report") OR ("health assistance networked synthesis report")))).
• Removing quotes may allow a broader search: (((( health evidence network systems report ) or ( health devices network systems report ))) or ((( health substance network synthesis report ) or ( health assistance networked synthesis report )))).
• Adding a wildcard symbol may retrieve word variants: (((("health evidence network systems report") or ("health devices network systems report"))) or ((("health substance network synthesis report") or ("health assistance networked synthesis report"))))*.