Perhaps you should try some spelling variations:
network synthesis » network systems
substrate network » subscribe networks, subscriber network, state network
health substrate » health substance, earth substrates, healing substrates
guide network » guided network, side network, wide network
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 guide network synthesis report ) OR ( health substrate network synthesis report )).
• Adding a wildcard symbol may retrieve word variants: (( health guide network synthesis report ) or ( health substrate network synthesis report ))*.