Perhaps you should try some spelling variations:
"health guidance network synthesis report" » "health guide network synthesis report", "health finance network synthesis report", "health impedance network synthesis report", "health substance network synthesis report"
health science » health sciences
systems report » system report, systems support, 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) OR (health science)) network synthesis report") OR ("((health evidence) OR (health science)) network systems report"))) OR ("health guidance network synthesis report")).
• Removing quotes may allow a broader search: (((( ((health evidence) OR (health science)) network synthesis report ) or ( ((health evidence) OR (health science)) network systems report ))) or ( health guidance network synthesis report )).
• Adding a wildcard symbol may retrieve word variants: (((("((health evidence) OR (health science)) network synthesis report") or ("((health evidence) OR (health science)) network systems report"))) or ("health guidance network synthesis report"))*.