Perhaps you should try some spelling variations:
health importance » health insurance
health impedance » health temperance, head impedance, health imperative
science network » sciences network, science networks, science work
health science » health sciences
systems report » systems support, systems recent, systems transport
network system » networked systems
dence network » dense network, defence network, dense networks
system report » system reform, system support, system recent
health dence » health device, health evidence, health devices

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