Perhaps you should try some spelling variations:
health impedance » health importance, health temperance, head impedance
science network » sciences network, science networks, science work
health science » health sciences
systems report » system report, systems support, systems recent
dence network » dense network, defence network, dense networks
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 synthesis report ) OR ((( health dence network synthesis report ) OR ( health dence network systems report ))))) OR ( health impedance network synthesis report )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( health science network synthesis report ) or ((( health dence network synthesis report ) OR ( health dence network systems report ))))) or ( health impedance network synthesis report ))".
• Adding a wildcard symbol may retrieve word variants: (((( health science network synthesis report ) or ((( health dence network synthesis report ) OR ( health dence network systems report ))))) or ( health impedance network synthesis report ))*.