Perhaps you should try some spelling variations:
"health importance network synthesis report" » "health important network synthesis report", "health impededance network synthesis report", "health importation network synthesis report", "health importance network systems report", "health insurance network synthesis report"
"health impedance network synthesis report" » "health impedance network systems report", "health temperance network synthesis report", "head impedance network synthesis report", "health imperative network synthesis report"
health science » health sciences

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