Perhaps you should try some spelling variations:
guidance network » guide network, finance network, science network
health impedance » health importance, health temperance, head impedance
systems report » system report, systems support, systems recent
dence network » dense network, defence network, dense networks
health dence » health device, health evidence, health science

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