Perhaps you should try some spelling variations:
"health evidence network synthesis report" » "health evidence network systems report", "health guidance network synthesis report", "health incidence networks synthesis report", "health resilience network synthesis report", "health evidense network synthesis report", "health evidefence network synthesis report", "health evidense networks synthesis report"
"health dence network synthesis report" » "health dence network systems report", "health dense network synthesis report", "health defence network synthesis report", "health dense networks synthesis report", "health device network synthesis report", "health devices network synthesis report", "health degree network synthesis report"
"health science network synthesis report" » "health science network systems report", "health sciences network synthesis report", "health science networks synthesis report", "health science work synthesis report"
"health substance network synthesis report" » "health substance network systems report", "health distance network synthesis report", "health substrate network synthesis report", "health resistance 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 dence network synthesis report"))) OR ("health science network synthesis report"))) OR ("health substance network synthesis report"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"health evidence network synthesis report\") OR (\"health dence network synthesis report\"))) or (\"health science network synthesis report\"))) or (\"health substance network synthesis report\"))*".
• Removing quotes may allow a broader search: (((((( health evidence network synthesis report ) OR ( health dence network synthesis report ))) or ( health science network synthesis report ))) or ( health substance network synthesis report ))*.