Perhaps you should try some spelling variations:
substance network » distance network, substrate network, resistance network
guidance network » guide network, finance network, impedance network
health guidance » health evidence, health finance
systems support » system support, systems supporting, system supporting
systems report » system report, systems recent, systems transport
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 dence network systems report ) OR ( health dence network systems support ))))) 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 dence network systems report ) OR ( health dence network systems support ))))) or ( health substance network synthesis report ))".
• Adding a wildcard symbol may retrieve word variants: (((( health guidance network systems report ) or ((( health dence network systems report ) OR ( health dence network systems support ))))) or ( health substance network synthesis report ))*.