Perhaps you should try some spelling variations:
network synthesis » network systems
systems support » system support, systems supporting, system supporting
health science » health sciences
systems report » system report, systems recent, systems transport

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