Perhaps you should try some spelling variations:
importance network » important network, impedance network, impededance network
health importance » health insurance
evidence network » science network, guidance network, dence network
health evidence » health science
health guidance » health substance
health finance » health financing, health insurance
systems report » system report, systems support, systems recent
health guided » health guide, hath guided, health guido

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)) network systems report ) OR ( health guided network systems report ))) OR ( health importance 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)) network systems report ) or ( health guided network systems report ))) or ( health importance network synthesis report ))))".
• Adding a wildcard symbol may retrieve word variants: (( health evidence network synthesis report ) or ((((( ((health guidance) OR (health finance)) network systems report ) or ( health guided network systems report ))) or ( health importance network synthesis report ))))*.