Perhaps you should try some spelling variations:
network synthesis » network systems
distance networks » resistance network, state networks, alliance networks
distance network » resistance network, disease network, finance network
network system » network systems, networked systems
dence network » dense network, defence network, dense networks
system report » system reform, system support, system reforms
guide network » guided network, side network, wide network
health dence » health device, health evidence, health science
health guide » health guido, earth guide, health grid

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