Perhaps you should try some spelling variations:
substance network » distance network, substrate network, resistance network
guidance network » guide network, finance network, guided network
health impedance » health importance, health temperance, head impedance
health guidance » health evidence, health finance
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 guidance network systems report ) OR ( health impedance network systems report ))) OR ( health dence network systems report ))) OR ( health substance network synthesis report )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((( health guidance network systems report ) OR ( health impedance network systems report ))) or ( health dence network systems report ))) or ( health substance network synthesis report ))".
• Adding a wildcard symbol may retrieve word variants: (((((( health guidance network systems report ) OR ( health impedance network systems report ))) or ( health dence network systems report ))) or ( health substance network synthesis report ))*.