Perhaps you should try some spelling variations:
health guidance » health substance
health science » health sciences
systems report » system report, systems support, systems recent
health finance » health financing, health insurance

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