Perhaps you should try some spelling variations:
network synthesis » network systems
evidence network » science network, guidance network, dence network
health evidence » health science
health guidance » health substance
health finance » health financing

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