Perhaps you should try some spelling variations:
science network » sciences network, science networks, science work
health guidance » health finance, health substance
systems report » system report, systems support, systems transport
health science » health sciences
dence network » dense network, defence network, dense networks
health dence » health device, health devices, health degree

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