Perhaps you should try some spelling variations:
"health evidence network synthesis report" » "health science network synthesis report", "health guidance network synthesis report", "health dence network synthesis report"
"health impedance network systems report" » "health importance network systems report", "health temperance network systems report", "head impedance network systems report", "health impedance network systems support", "health impedance network systems recent", "health impedance network systems transport", "health impedance networked systemss report"
"health impedance network system report" » "health importance network system report", "health temperance network system report", "head impedance network system report", "health impedance networked systems report", "health impedance network system reform", "health impedance network system support", "health impedance network system recent"
health device » health service, health services
health dence » health science, health devices, health degree

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) or (health device)) network synthesis report"))) OR ((("health impedance network systems report") OR ("health impedance network system report"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"health evidence network synthesis report\") or (\"((health dence) or (health device)) network synthesis report\"))) or (((\"health impedance network systems report\") OR (\"health impedance network system report\"))))*".
• Removing quotes may allow a broader search: (((( health evidence network synthesis report ) or ( ((health dence) or (health device)) network synthesis report ))) or ((( health impedance network systems report ) OR ( health impedance network system report ))))*.