Perhaps you should try some spelling variations:
network synthesis » network systems
insurance network » insurance networks, assurance network, assurance networks
health device » health service, health services
system report » system reform, system reforms
system recent » systems recent
guide network » guided network, side network, wide network
health dence » health evidence, health science, health devices
health guide » health guido, earth guide, health grid

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 dence) OR (health device)) network ((((system report) OR (system recent))) OR (system support)) ) OR ((( health guide network synthesis report ) OR ( health insurance network synthesis report )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((health dence) or (health device)) network ((((system report) OR (system recent))) or (system support)) ) or ((( health guide network synthesis report ) or ( health insurance network synthesis report ))))".
• Adding a wildcard symbol may retrieve word variants: (( ((health dence) or (health device)) network ((((system report) OR (system recent))) or (system support)) ) or ((( health guide network synthesis report ) or ( health insurance network synthesis report ))))*.